SSL_SESS_CACHE_SERVER
#define SSL_SESS_CACHE_BOTH (SSL_SESS_CACHE_CLIENT|SSL_SESS_CACHE_SERVER)
ret->internal->session_cache_mode = SSL_SESS_CACHE_SERVER;
if (!(s->ctx->internal->session_cache_mode & SSL_SESS_CACHE_SERVER)
ssl_update_cache(s, SSL_SESS_CACHE_SERVER);