bug 31510: changes default manual proxy config so localhost and 127.0.0.1 are not proxied

patch by benc, r=dougt sr=darin

modules/libpref/src/init/all.js

@@ -554,7 +554,7 @@ pref("network.proxy.ssl_port",              0);
 pref("network.proxy.socks",                 "");
 pref("network.proxy.socks_port",            0);
 pref("network.proxy.socks_version",         5);
-pref("network.proxy.no_proxies_on",         "");
+pref("network.proxy.no_proxies_on",         "localhost, 127.0.0.1");
 pref("network.online",                      true); //online/offline
 pref("network.cookie.cookieBehavior",       3); // 0-Accept, 1-dontAcceptForeign, 2-dontUse, 3-p3p
 pref("network.cookie.disableCookieForMailNews", true); // disable all cookies for mail