[B<-context id>]
[B<-verify depth>]
[B<-Verify depth>]
+[B<-crl_check>]
+[B<-crl_check_all>]
[B<-cert filename>]
[B<-certform DER|PEM>]
[B<-key keyfile>]
client does not have to send one, with the B<-Verify> option the client
must supply a certificate or an error occurs.
+=item B<-crl_check>, B<-crl_check_all>
+
+Check the peer certificate has not been revoked by its CA.
+The CRL(s) are appended to the certificate file. With the B<-crl_check_all>
+option all CRLs of all CAs in the chain are checked.
+
=item B<-CApath directory>
The directory to use for client certificate verification. This directory