feature: fixed compilation errors with nginx 1.9.1+. thanks Vadim A. Misbakh-Soloviov for the original patch in #38.

Author: agentzh

src/ngx_postgres_util.c

@@ -45,7 +45,9 @@ void
 ngx_postgres_upstream_finalize_request(ngx_http_request_t *r,
     ngx_http_upstream_t *u, ngx_int_t rc)
 {
+#if defined(nginx_version) && (nginx_version < 1009001)
     ngx_time_t  *tp;
+#endif
 
     dd("entering");
 
@@ -61,10 +63,15 @@ ngx_postgres_upstream_finalize_request(ngx_http_request_t *r,
         u->resolved->ctx = NULL;
     }
 
+#if defined(nginx_version) && (nginx_version >= 1009001)
+    if (u->state && u->state->response_time) {
+        u->state->response_time = ngx_current_msec - u->state->response_time;
+#else
     if (u->state && u->state->response_sec) {
         tp = ngx_timeofday();
         u->state->response_sec = tp->sec - u->state->response_sec;
         u->state->response_msec = tp->msec - u->state->response_msec;
+#endif
 
         if (u->pipe) {
             u->state->response_length = u->pipe->read_length;