Fix docs for ssl_ciphers, fix FEAT handling, disable TLSv1, TLSv1.1
    
    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.