tcptls: Handle new OpenSSL compile time option to disable SSLv3

tcptls: Handle new OpenSSL compile time option to disable SSLv3

Some distributions are going to disable SSLv3 at compile time. This option can
be checked using the directive OPENSSL_NO_SSL3_METHOD. This patch updates the
TCP/TLS handling in Asterisk to look for that directive before attempting to
use the SSLv3 specific methods.

ASTERISK-24799 #close
Reported by: Alexander Traud
patches:
  no-ssl3-method.patch uploaded by Alexander Traud (License 6520)
........

Merged revisions 431936 from http://svn.asterisk.org/svn/asterisk/branches/11

git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@431937 65c4cc65-6c06-0410-ace0-fbb531ad65f3