Record SSL client and SSL server details (supported TLS version/requested

Record SSL client and SSL server details (supported TLS version/requested
TLS version) for fast-sni branch

Currently the fast-SNI-peek branch does not parse SSL client hello in
Client-First and Server-First bumping modes. This patch always "peeks" the
SSL client hello message and apply the squid TLS parser for Client-First
and Server-First modes to.

Also this patch moves the code which retrieves SSL server details from
PeekingPeerConnector class to PeerConnector class t retrieve details  for all
SSL server side connections.