Default enable http forward cookies

... else the option is useless since nobody will think of enabling it.
(cherry picked from commit 02aeb3ca)

modules/access/http.c

@@ -114,7 +114,7 @@ vlc_module_begin();
               RECONNECT_LONGTEXT, true );
     add_bool( "http-continuous", 0, NULL, CONTINUOUS_TEXT,
               CONTINUOUS_LONGTEXT, true );
-    add_bool( "http-forward-cookies", 0, NULL, FORWARD_COOKIES_TEXT,
+    add_bool( "http-forward-cookies", true, NULL, FORWARD_COOKIES_TEXT,
               FORWARD_COOKIES_LONGTEXT, true );
     add_obsolete_string("http-user");
     add_obsolete_string("http-pwd");