Bug 1730983 - Notify the change of pref "network.disable-localhost-when-offline" to socket process, r=necko-reviewers,valentin

Differential Revision: https://phabricator.services.mozilla.com/D125759

netwerk/base/nsIOService.cpp

@@ -220,6 +220,7 @@ static const char* gCallbackPrefsForSocketProcess[] = {
     "network.dns.disableIPv6",
     "network.dns.skipTRR-when-parental-control-enabled",
     "network.offline-mirrors-connectivity",
+    "network.disable-localhost-when-offline",
     nullptr,
 };