Rename NOTES*, README*, VERSION, HACKING, LICENSE to .md or .txt Reviewed-by: Tim Hudson <tjh@openssl.org> (Merged from https://github.com/openssl/openssl/pull/12109)
Reorganize local header files Apart from public and internal header files, there is a third type called local header files, which are located next to source files in the source directory. Currently, they have different suffixes like '*_lcl.h', '*_local.h', or '*_int.h' This commit changes the different suffixes to '*_local.h' uniformly. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9333)
Version negotiation rewrite cleanup Following the version negotiation rewrite all of the previous code that was dedicated to version negotiation can now be deleted - all six source files of it!! Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Add Record Layer documentation Add some design documentation on how the record layer works to aid future maintenance. Reviewed-by: Richard Levitte <levitte@openssl.org>