Win32: timer_resolution now ignored with select.

As setitimer() isn't available on Windows, time wasn't updated at all
if timer_resolution was used with the select event method.  Fix is
to ignore timer_resolution in such cases.

src/event/ngx_event.c

diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index b8e0607..15da213 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -670,6 +670,15 @@
         }
     }
 
+#else
+
+    if (ngx_timer_resolution && !(ngx_event_flags & NGX_USE_TIMER_EVENT)) {
+        ngx_log_error(NGX_LOG_WARN, cycle->log, 0,
+                      "the \"timer_resolution\" directive is not supported "
+                      "with the configured event method, ignored");
+        ngx_timer_resolution = 0;
+    }
+
 #endif
 
     cycle->connections =