merge r3456, r3458, r3465:

merge r3456, r3458, r3465:

SSL fixes:

*) decrease SSL handshake error level to info
*) Set SSL session context for "ssl_session_cache none".
   This fixes a bug when client certficate is used and nginx closes connection
   with the message: "SSL_GET_PREV_SESSION:session id context uninitialized".
*) add OpenSSL_add_all_algorithms(), this fixes the error
   "ASN1_item_verify:unknown message digest algorithm" occurred if
   client certificate is signed using sha256WithRSAEncryption