mod_ssl: check request-server for TLS settings compatible to handshake server,...

mod_ssl: check request-server for TLS settings compatible to handshake server, allow request if equal, renegotiation checks: remember last used cipher_suite for optimizations, deny any regnegotiation in presence of master connection

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1709995 13f79535-47bb-0310-9956-ffa450edef68