ngx_ssl_get_protocol  119 event/ngx_event_openssl.h ngx_int_t ngx_ssl_get_protocol(ngx_connection_t *c, ngx_pool_t *pool,
ngx_ssl_get_protocol  182 http/modules/ngx_http_ssl_module.c       (uintptr_t) ngx_ssl_get_protocol, NGX_HTTP_VAR_CHANGEABLE, 0 },