support reload config(vhost and its detail).

trunk/conf/srs.conf

@@ -1,5 +1,5 @@
 # the listen ports, split by space.
-listen 1935 19350;
+listen 1935;
 # the default chunk size is 128, max is 65536,
 # some client does not support chunk size change,
 # however, most clients supports it and it can improve 
@@ -9,7 +9,6 @@ chunk_size 65000;
 # vhost list, the __defaultVhost__ is the default vhost
 # for which cannot identify the required vhost.
 vhost __defaultVhost__ {
-    gop_cache       off;
 }
 # the vhost disabled.
 vhost removed.vhost.com {