Currently, if firewalld is not running, then the firewall zone combo is
always insensitive. This would make sense if firewalld was great and we
were to consider it a distro bug to not have firewalld running and
enabled, then users would be able to see the option is disabled and
think "maybe my distro has done something wrong."
But in actuality, firewalld is not really great, only Fedora ships it
and we're not really recommending it to other distros. So hide the combo
if it's not running, else it's just broken on $NOTFEDORA.
https://bugzilla.gnome.org/show_bug.cgi?id=763477
From coverity:
gnome-control-center-3.14.5/panels/network/connection-editor/firewall-helpers.c:75:9: warning: passing argument 1 of 'g_free' discards 'const' qualifier from pointer target type [enabled by default]
https://bugzilla.gnome.org/show_bug.cgi?id=749897
The call to nm_setting_connection_get_zone() returns a pointer to
memory that will be freed before the D-Bus reply handler is called.
Make sure to take a copy of the string, and free it when finished.
https://bugzilla.gnome.org/show_bug.cgi?id=739971
