cache_mode       1429 event/ngx_event_openssl.c     long  cache_mode;
cache_mode       1461 event/ngx_event_openssl.c     cache_mode = SSL_SESS_CACHE_SERVER;
cache_mode       1464 event/ngx_event_openssl.c         cache_mode |= SSL_SESS_CACHE_NO_INTERNAL;
cache_mode       1467 event/ngx_event_openssl.c     SSL_CTX_set_session_cache_mode(ssl->ctx, cache_mode);