multi-process model: Improve

Signed-off-by: Jianhui Zhao <zhaojh329@gmail.com>

src/uhttpd.c

@@ -159,6 +159,7 @@ static void uh_start_worker(struct uh_server *srv, int n)
         case 0:
             ev_loop_fork(srvi->loop);
             uh_start_accept(srvi);
+            ev_run(srvi->loop, 0);
             return;
         }
     }

src/uhttpd.h

@@ -81,6 +81,7 @@ struct uh_server {
     void (*free)(struct uh_server *srv);
     /*
     ** Start n worker processes to process the requests
+    ** Must be called after the Server has been initialized
     ** If n is -1, automatically to available CPUs
     */
     void (*start_worker)(struct uh_server *srv, int n);