e439c13666
In #621429 a call to nsUnixSystemProxySettings::GetSystemWPADSetting() was added, but that function is not available for builds with MOZ_ENABLE_LIBPROXY. The funtion is trivial enough to just copy it across - else there'd more boilerplate than actual code. Differential Revision: https://phabricator.services.mozilla.com/D207197