Document the new default for ssl_ciphers in the man page
Related: rhbz#1483970
When handling the FEAT command, check ssl_tlsv1_1 and ssl_tlsv1_2
Patch was written by Martin Sehnoutka
Resolves: rhbz#1432054
Disable TLSv1 and TLSv1.1 - enable only TLSv1.2 by default.
