change existing ssl_init_ctx() to ssl_init_ctx_protocol()

new ssl_init_ctx() inits the lot: protocol, session_cache, callbacks,
verify, cipher suite, crl, cert_chain

new ssl_init_server_ctx function inits everything for sc->server


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94285 13f79535-47bb-0310-9956-ffa450edef68