add flv cluster confs.

+listen              19351;
+max_connections     1000;
+pid                 objs/srs.flv.19351.pid;
+srs_log_file        objs/srs.flv.19351.log;
+http_server {
+    enabled         on;
+    listen          8081;
+    dir             ./objs/nginx/html;
+}
+vhost __defaultVhost__ {
+    mode remote;
+    origin 127.0.0.1;
+    http_remux {
+        enabled     on;
+        mount       [vhost]/[app]/[stream].flv;
+        hstrs       on;
+    }
+}

+listen              19352;
+max_connections     1000;
+pid                 objs/srs.flv.19352.pid;
+srs_log_file        objs/srs.flv.19352.log;
+http_server {
+    enabled         on;
+    listen          8082;
+    dir             ./objs/nginx/html;
+}
+vhost __defaultVhost__ {
+    mode remote;
+    origin 127.0.0.1;
+    http_remux {
+        enabled     on;
+        mount       [vhost]/[app]/[stream].flv;
+        hstrs       on;
+    }
+}