pfSense

Etc/GMT timezone text using ngettext()

(cherry picked from commit 88de4ab06c8a330a3cedf474b3e218a941f6db66)

Ticket #7089 Enhance Etc/GMT timezone descriptions

These work opposite to the way mere mortals expect.
Read: https://github.com/eggert/tz/blob/master/etcetera

Based on @phil-davis' patch from https://github.com/pfsense/pfsense/pull/3354

Redmine #7089 Add extra help about timezone

We could also add some text like this to encourage users to choose the "Continent/City" time zones.
(cherry picked from commit 0436b9a5197ac8c4646a006c0e351ecf66059193)

Correctly report unmonitored gateway status

If an alternate monitor IP has been entered and saved, then the user
checks "Disable Gateway Monitoring" and saves, the alternate monitor IP
is retained in the config - that is handy for when unchecking "Disable...

get_pkg_info() fallback using pkg info if no local copy of repo catalog

Current behaviour

At the moment, get_pkg_info() is used to get all information on packages. The parameter $local_only is set to request info directly from the local copy of the repo catalog (using -U) without requesting the remote repo catalog or updating the local copy from the remote repo catalog. If the calling code wants only installed pkgs, it filters the returned list of pkgs looking for $pkg['installed'] == true....

Fix a probably copy/paste error

As done on OpenVPN Server, delete tunnel when dev_mode changes so new device is created accordingly

Remove unnecessary reference

Fix conditional to work as expected when $id == 0

Remove direct calls to /sbin/ifconfig destroy by pfSense_interface_destroy()