Fix error handling in ssltest

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit ae632974f905c59176fa5f312826f8f692890b67)

Fixed bad formatting in crypto/des/spr.h

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 7e35f06ea908e47f87b723b5e951ffc55463eb8b)

Check PKCS#8 pkey field is valid before cleansing.

PR:3683
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 52e028b9de371da62c1e51b46592517b1068d770)

Fix for reformat problems with e_padlock.c

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit d3b7cac41b957704932a0cdbc74d4d48ed507cd0)

Fix formatting error in pem.h

Reviewed-by: Andy Polyakov <appro@openssl.org>
Conflicts:
crypto/pem/pem.h

Conflicts:
crypto/pem/pem.h

Re-align some comments after running the reformat script.
This should be a one off operation (subsequent invokation of the
script should not move them)

This commit is for the 0.9.8 changes

Reviewed-by: Tim Hudson <tjh@openssl.org>

Rerun util/openssl-format-source -v -c .

Reviewed-by: Tim Hudson <tjh@openssl.org>

Run util/openssl-format-source -v -c .

Reviewed-by: Tim Hudson <tjh@openssl.org>

More comment changes required for indent

Reviewed-by: Tim Hudson <tjh@openssl.org>

Yet more changes to comments

Conflicts:
ssl/t1_enc.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

More tweaks for comments due indent issues

Conflicts:
ssl/ssl_ciph.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Backport hw_ibmca.c from master due to failed merge

Reviewed-by: Tim Hudson <tjh@openssl.org>

Tweaks for comments due to indent's inability to handle them

Conflicts:
ssl/s3_srvr.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Move more comments that confuse indent

Conflicts:
crypto/dsa/dsa.h
demos/engines/ibmca/hw_ibmca.c
ssl/ssl_locl.h

Conflicts:
crypto/bn/rsaz_exp.c
crypto/evp/e_aes_cbc_hmac_sha1.c
crypto/evp/e_aes_cbc_hmac_sha256.c
ssl/ssl_locl.h

Conflicts:
crypto/ec/ec2_oct.c
crypto/ec/ecp_nistp256.c
crypto/ec/ecp_nistp521.c
crypto/ec/ecp_nistputil.c
crypto/ec/ecp_oct.c
crypto/modes/gcm128.c
ssl/ssl_locl.h

Conflicts:
apps/apps.c
crypto/crypto.h
crypto/rand/md_rand.c
ssl/d1_pkt.c
ssl/ssl.h
ssl/ssl_locl.h
ssl/ssltest.c
ssl/t1_enc.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Delete trailing whitespace from output.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Add -d debug option to save preprocessed files.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Test option -nc

Add option -nc which sets COMMENTS=true but disables all indent comment
reformatting options.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Add ecp_nistz256.c to list of files skipped by openssl-format-source

Reviewed-by: Tim Hudson <tjh@openssl.org>

Manually reformat aes_x86core.c and add it to the list of files skipped by
openssl-format-source

Conflicts:
crypto/aes/aes_x86core.c

Conflicts:
crypto/aes/aes_x86core.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix indent comment corruption issue

Reviewed-by: Tim Hudson <tjh@openssl.org>

Amend openssl-format-source so that it give more repeatable output

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/bn_const.c: make it indent-friendly.

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/asm/x86_64-gcc.cL make it indent-friendly.

Conflicts:
crypto/bn/asm/x86_64-gcc.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/bn_asm.c: make it indent-friendly.

Conflicts:
crypto/bn/bn_asm.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/bn_exp.c: make it indent-friendly.

Conflicts:
crypto/bn/bn_exp.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Manually reformat aes_core.c
Add aes_core.c to the list of files not processed by openssl-format-source

Conflicts:
crypto/aes/aes_core.c

Conflicts:
crypto/aes/aes_core.c

Conflicts:
crypto/aes/aes_core.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Add obj_dat.h to the list of files that will not be processed by
openssl-format-source

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix strange formatting by indent

Conflicts:
crypto/hmac/hmac.h

Conflicts:
crypto/evp/e_aes_cbc_hmac_sha256.c

Conflicts:
crypto/ec/ecp_nistp224.c
crypto/ec/ecp_nistp256.c
crypto/ec/ecp_nistp521.c
crypto/ec/ectest.c

Conflicts:
crypto/asn1/asn1_par.c
crypto/evp/e_des3.c
crypto/hmac/hmac.h
crypto/sparcv9cap.c
engines/ccgost/gost94_keyx.c
ssl/t1_enc.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

indent has problems with comments that are on the right hand side of a line.
Sometimes it fails to format them very well, and sometimes it corrupts them!
This commit moves some particularly problematic ones.

Conflicts:
crypto/bn/bn.h
crypto/ec/ec_lcl.h
crypto/rsa/rsa.h
demos/engines/ibmca/hw_ibmca.c
ssl/ssl.h
ssl/ssl3.h

Conflicts:
crypto/ec/ec_lcl.h
ssl/tls1.h

Conflicts:
crypto/ec/ecp_nistp224.c
crypto/evp/evp.h
ssl/d1_both.c
ssl/ssl.h
ssl/ssl_lib.c

Conflicts:
crypto/bio/bss_file.c
crypto/ec/ec_lcl.h
crypto/evp/evp.h
crypto/store/str_mem.c
crypto/whrlpool/wp_block.c
crypto/x509/x509_vfy.h
ssl/ssl.h
ssl/ssl3.h
ssl/ssltest.c
ssl/t1_lib.c
ssl/tls1.h

Reviewed-by: Tim Hudson <tjh@openssl.org>

crypto/mem_dbg.c: make it indent-friendly.

Conflicts:
crypto/mem_dbg.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

More indent fixes for STACK_OF

Conflicts:
ssl/s3_lib.c

Conflicts:
apps/cms.c
crypto/x509/x509_lu.c
crypto/x509/x509_vfy.h
ssl/s3_lib.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix indent issue with engine.h

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix logic to check for indent.pro

Reviewed-by: Tim Hudson <tjh@openssl.org>

crypto/cryptlib.c: make it indent-friendly.

Conflicts:
crypto/cryptlib.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/bntest.c: make it indent-friendly.

Conflicts:
crypto/bn/bntest.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

bn/bn_recp.c: make it indent-friendly.

Reviewed-by: Tim Hudson <tjh@openssl.org>

engines/e_ubsec.c: make it indent-friendly.

Reviewed-by: Tim Hudson <tjh@openssl.org>

apps/speed.c: make it indent-friendly.

Conflicts:
apps/speed.c

Conflicts:
apps/speed.c

Conflicts:
apps/speed.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Fix make errors

Reviewed-by: Tim Hudson <tjh@openssl.org>

Make the script a little more location agnostic

Reviewed-by: Tim Hudson <tjh@openssl.org>

Provide script for filtering data initialisers for structs/unions. indent just can't handle it.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Script fixes.

Don't use double newline for headers.
Don't interpret ASN1_PCTX as start of an ASN.1 module.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Run expand before perl, to make sure things are properly aligned

Reviewed-by: Tim Hudson <tjh@openssl.org>

Force the use of our indent profile

Reviewed-by: Tim Hudson <tjh@openssl.org>

Provide source reformating script. Requires GNU indent to be
available.

Script written by Tim Hudson, with amendments by Steve Henson, Rich Salz and
Matt Caswell

Reviewed-by: Matt Caswell <matt@openssl.org>

Fix source where indent will not be able to cope

Conflicts:
apps/ciphers.c
ssl/s3_pkt.c

Conflicts:
crypto/ec/ec_curve.c

Conflicts:
crypto/ec/ec_curve.c
ssl/s3_clnt.c
ssl/s3_srvr.c
ssl/ssl_sess.c

Conflicts:
apps/ciphers.c
crypto/bn/bn.h
crypto/ec/ec_curve.c
ssl/t1_enc.c
ssl/t1_lib.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Additional comment changes for reformat of 0.9.8

Reviewed-by: Tim Hudson <tjh@openssl.org>

Further comment amendments to preserve formatting prior to source reformat

(cherry picked from commit 4a7fa26ffd65bf36beb8d1cb8f29fc0ae203f5c5)

Conflicts:
crypto/x509v3/pcy_tree.c

Conflicts:
apps/apps.c
ssl/ssltest.c

Conflicts:
apps/apps.c
crypto/ec/ec2_oct.c
crypto/ec/ecp_nistp224.c
crypto/ec/ecp_nistp256.c
crypto/ec/ecp_nistp521.c
ssl/s3_cbc.c
ssl/ssl_sess.c
ssl/t1_lib.c

Conflicts:
crypto/bio/b_sock.c
crypto/pem/pem.h
crypto/x509/x509_vfy.c
crypto/x509v3/pcy_tree.c
ssl/s3_both.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

mark all block comments that need format preserving so that
indent will not alter them when reformatting comments

(cherry picked from commit 1d97c8435171a7af575f73c526d79e1ef0ee5960)

Conflicts:
crypto/bn/bn_lcl.h
crypto/bn/bn_prime.c
crypto/engine/eng_all.c
crypto/rc4/rc4_utl.c
crypto/sha/sha.h
ssl/kssl.c
ssl/t1_lib.c

Conflicts:
crypto/rc4/rc4_enc.c
crypto/x509v3/v3_scts.c
crypto/x509v3/v3nametest.c
ssl/d1_both.c
ssl/s3_srvr.c
ssl/ssl.h
ssl/ssl_locl.h
ssl/ssltest.c
ssl/t1_lib.c

Conflicts:
crypto/asn1/a_sign.c
crypto/bn/bn_div.c
crypto/dsa/dsa_asn1.c
crypto/ec/ecp_nistp224.c
crypto/ec/ecp_nistp256.c
crypto/ec/ecp_nistp521.c
crypto/ec/ecp_nistputil.c
crypto/modes/gcm128.c
crypto/opensslv.h
ssl/d1_both.c
ssl/heartbeat_test.c
ssl/s3_clnt.c
ssl/s3_srvr.c
ssl/ssl_sess.c
ssl/t1_lib.c
test/testutil.h

Conflicts:
apps/openssl.c
apps/ts.c
apps/vms_decc_init.c
crypto/aes/aes_core.c
crypto/aes/aes_x86core.c
crypto/dsa/dsa_ameth.c
crypto/ec/ec2_mult.c
crypto/evp/evp.h
crypto/objects/objects.h
crypto/rsa/rsa_pss.c
crypto/stack/safestack.h
crypto/ts/ts.h
crypto/ts/ts_rsp_verify.c
crypto/whrlpool/wp_dgst.c
crypto/x509v3/v3_ncons.c
e_os2.h
engines/ccgost/gost89.c
engines/ccgost/gost_ctl.c
engines/ccgost/gost_keywrap.c
engines/ccgost/gost_keywrap.h
engines/ccgost/gost_sign.c
ssl/kssl.c
ssl/s3_srvr.c

Reviewed-by: Tim Hudson <tjh@openssl.org>

Prepare for 0.9.8zf-dev

Reviewed-by: Stephen Henson <steve@openssl.org>

Prepare for 0.9.8ze release

Reviewed-by: Stephen Henson <steve@openssl.org>

make update

Reviewed-by: Stephen Henson <steve@openssl.org>

Updates to CHANGES and NEWS

Reviewed-by: Dr Stephen Henson <steve@openssl.org>

Fix warning where BIO_FLAGS_UPLINK was being redefined.
This warning breaks the build in 1.0.0 and 0.9.8

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit b1ffc6ca1c387efad0772c16dfe426afef45dc4f)

Avoid deprecation problems in Visual Studio 13

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 86d21d0b9577322ac5da0114c5fac16eb49b4cef)

Conflicts:
e_os.h

Avoid Windows 8 Getversion deprecated errors.

Windows 8 SDKs complain that GetVersion() is deprecated.

We only use GetVersion like this:

(GetVersion() < 0x80000000)

which checks if the Windows version is NT based. Use a macro check_winnt()
which uses GetVersion() on older SDK versions and true otherwise.
(cherry picked from commit a4cc3c8041104896d51ae12ef7b678c31808ce52)

Conflicts:
apps/apps.c
crypto/bio/bss_log.c

Backported by Matt Caswell <matt@openssl.org>
Reviewed-by: Tim Hudson <tjh@openss.org>

Further windows specific .gitignore entries

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 41c9cfbc4ee7345547fb98cccb8511f082f0910b)

Update .gitignore with windows files to be excluded from git

Reviewed-by: Tim Hudson <tjh@openssl.org>
Conflicts:
.gitignore

(cherry picked from commit 04f670cf3d8f22e0d197a071d2db536fb7ebd9c7)

Conflicts:
.gitignore

Prepare for 0.9.8ze-dev

Reviewed-by: Stephen Henson <steve@openssl.org>

Prepare for 0.9.8zd release

Reviewed-by: Stephen Henson <steve@openssl.org>

make update

Reviewed-by: Stephen Henson <steve@openssl.org>

CHANGES and NEWS updates for release

Reviewed-by: Tim Hudson <tjh@openssl.org>
Reviewed-by: Steve Henson <steve@openssl.org>

Fix typo.

Fix typo in ssl3_get_cert_verify: we can only skip certificate verify
message if certificate is absent.

NB: OpenSSL 0.9.8 is NOT vulnerable to CVE-2015-0205 as it doesn't
support DH certificates and this typo prohibits skipping of
certificate verify message for sign only certificates anyway.

Reviewed-by: Matt Caswell <matt@openssl.org>

Follow on from CVE-2014-3571. This fixes the code that was the original source
of the crash due to p being NULL. Steve's fix prevents this situation from
occuring - however this is by no means obvious by looking at the code for
dtls1_get_record. This fix just makes things look a bit more sane.

Conflicts:
ssl/d1_pkt.c

Reviewed-by: Dr Stephen Henson <steve@openssl.org>

Fix crash in dtls1_get_record whilst in the listen state where you get two
separate reads performed - one for the header and one for the body of the
handshake record.

CVE-2014-3571

Reviewed-by: Matt Caswell <matt@openssl.org>
Conflicts:
ssl/s3_pkt.c

Fix for CVE-2014-3570.

Reviewed-by: Emilia Kasper <emilia@openssl.org>
(cherry picked from commit e793809ba50c1e90ab592fb640a856168e50f3de)

fix error discrepancy

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 4a4d4158572fd8b3dc641851b8378e791df7972d)

use correct credit in CHANGES

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 4138e3882556c762d77eb827b8be98507cde48df)

Conflicts:
CHANGES

use correct function name

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit cb62ab4b17818fe66d2fed0a7fe71969131c811b)

Only allow ephemeral RSA keys in export ciphersuites.

OpenSSL clients would tolerate temporary RSA keys in non-export
ciphersuites. It also had an option SSL_OP_EPHEMERAL_RSA which
enabled this server side. Remove both options as they are a
protocol violation.

Thanks to Karthikeyan Bhargavan for reporting this issue.
(CVE-2015-0204)
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 4b4c1fcc88aec8c9e001b0a0077d3cd4de1ed0e6)

Conflicts:
CHANGES
doc/ssl/SSL_CTX_set_options.pod
ssl/d1_srvr.c
ssl/s3_srvr.c

ECDH downgrade bug fix.

Fix bug where an OpenSSL client would accept a handshake using an
ephemeral ECDH ciphersuites with the server key exchange message omitted.

Thanks to Karthikeyan Bhargavan for reporting this issue.

CVE-2014-3572
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit b15f8769644b00ef7283521593360b7b2135cb63)

Conflicts:
CHANGES
ssl/s3_clnt.c

Fix various certificate fingerprint issues.

By using non-DER or invalid encodings outside the signed portion of a
certificate the fingerprint can be changed without breaking the signature.
Although no details of the signed portion of the certificate can be changed
this can cause problems with some applications: e.g. those using the
certificate fingerprint for blacklists.

1. Reject signatures with non zero unused bits.

If the BIT STRING containing the signature has non zero unused bits reject
the signature. All current signature algorithms require zero unused bits.

2. Check certificate algorithm consistency.

Check the AlgorithmIdentifier inside TBS matches the one in the
certificate signature. NB: this will result in signature failure
errors for some broken certificates.

3. Check DSA/ECDSA signatures use DER.

Reencode DSA/ECDSA signatures and compare with the original received
signature. Return an error if there is a mismatch.

This will reject various cases including garbage after signature
(thanks to Antti Karjalainen and Tuomo Untinen from the Codenomicon CROSS
program for discovering this case) and use of BER or invalid ASN.1 INTEGERs
(negative or with leading zeroes).

CVE-2014-8275
Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit 208a6012be3077d83df4475f32dd1b1446f3a02e)

Conflicts:
crypto/dsa/dsa_vrf.c

Update ordinals.

Reviewed-by: Emilia Käsper <emilia@openssl.org>

Add ASN1_TYPE_cmp and X509_ALGOR_cmp.

(these are needed for certificate fingerprint fixes)
Reviewed-by: Emilia Käsper <emilia@openssl.org>

Return error when a bit string indicates an invalid amount of bits left

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 86edf13b1c97526c0cf63c37342aaa01f5442688)

Reject invalid constructed encodings.

According to X6.90 null, object identifier, boolean, integer and enumerated
types can only have primitive encodings: return an error if any of
these are received with a constructed encoding.
Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit f5e4b6b5b566320a8d774f9475540f7d0e6a704d)

Conflicts:
crypto/asn1/asn1_err.c

Revert "RT3425: constant-time evp_enc"

Causes more problems than it fixes: even though error codes
are not part of the stable API, several users rely on the
specific error code, and the change breaks them. Conversely,
we don't have any concrete use-cases for constant-time behaviour here.

This reverts commit 1bb01b1b5f27a7de33e7a67946b8c001b54e09e9.

Reviewed-by: Andy Polyakov <appro@openssl.org>

Fix warning about negative unsigned intergers

Reviewed-by: Richard Levitte <levitte@openssl.org>

md32_common.h: address compiler warning in HOST_c2l.

Reviewed-by: Stephen Henson <steve@openssl.org>
(cherry picked from commit d45282fc7cd9b97ed1479f8b8af713337fce57f5)

Use only unsigned arithmetic in constant-time operations

Signed-off-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Emilia Käsper <emilia@openssl.org>

Fix and improve SSL_MODE_SEND_FALLBACK_SCSV documentation.

Reviewed-by: Rich Salz <rsalz@openssl.org>

When processing ClientHello.cipher_suites, don't ignore cipher suites
listed after TLS_FALLBACK_SCSV.

RT: 3575
Reviewed-by: Emilia Kasper <emilia@openssl.org>

Fix warning

Reviewed-by: Emilia Käsper <emilia@openssl.org>

Keep old method in case of an unsupported protocol

When we're configured with no-ssl3 and we receive an SSL v3 Client Hello, we set
the method to NULL.  We didn't used to do that, and it breaks things.  This is a
regression introduced in 62f45cc27d07187b59551e4fad3db4e52ea73f2c.  Keep the old
method since the code is not able to deal with a NULL method at this time.

CVE-2014-3569, PR#3571

Reviewed-by: Emilia Käsper <emilia@openssl.org>
(cherry picked from commit 392fa7a952e97d82eac6958c81ed1e256e6b8ca5)

no-ssl2 with no-ssl3 does not mean drop the ssl lib

Reviewed-by: Geoff Thorpe <geoff@openssl.org>

Add constant_time_locl.h to HEADERS,
so the Win32 compile picks it up correctly.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit e2e5326e5b068411999f62b4ba67835d64764ca5)

Include "constant_time_locl.h" rather than "../constant_time_locl.h".
The different -I compiler parameters will take care of the rest...

Reviewed-by: Tim Hudson <tjh@openssl.org>
(cherry picked from commit 8202802fadf7f70c656b92f3697da39c9c4271d7)

Conflicts:
crypto/evp/evp_enc.c

e_os.h: refine inline override logic (to address warnings in debug build).

Reviewed-by: Dr Stephen Henson <steve@openssl.org>
(cherry picked from commit 55c7a4cf112bf154ed405ee05a6b7924b6b1ba92)

e_os.h: allow inline functions to be compiled by legacy compilers.

Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 40155f408985aff2e9f1b61b7cb04a3e518633a1)

Conflicts:
e_os.h

RT3547: Add missing static qualifier

Reviewed-by: Ben Laurie <ben@openssl.org>
(cherry picked from commit 87d388c955c14a7c1371f9c7555fb429a406a3d3)

Don't try 1**0 test with FIPS.

The 1**0 test will fail for FIPS capable builds because it uses the
old BIGNUM code in the 1.2 FIPS module which can't be fixed.
Reviewed-by: Emilia Käsper <emilia@openssl.org>

Prepare for 0.9.8zd-dev

Reviewed-by: Stephen Henson <steve@openssl.org>

Prepare for 0.9.8zc release

Reviewed-by: Stephen Henson <steve@openssl.org>

make update

Reviewed-by: Stephen Henson <steve@openssl.org>

Updates to NEWS

Reviewed-by: Dr Stephen Henson <steve@openssl.org>

Updates to CHANGES file

Reviewed-by: Bodo Möller <bodo@openssl.org>

Fix no-ssl3 configuration option

CVE-2014-3568

Reviewed-by: Emilia Kasper <emilia@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

Fix for session tickets memory leak.

CVE-2014-3567

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(cherry picked from commit 90e53055939db40cf0fac1ad0c59630280aeee86)

Fix SSL_R naming inconsistency.

Reviewed-by: Tim Hudson <tjh@openssl.org>

Add TLS_FALLBACK_SCSV documentation, and move s_client -fallback_scsv
handling out of #ifndef OPENSSL_NO_DTLS1 section.

Reviewed-by: Rich Salz <rsalz@openssl.org>