pfSense

Add some protection to parameters that come through _GET

Allow the user to select "None" for OpenVPN client certificate, so long as they supply and auth user/pass. Ticket #3633

Silent pbi_info

Reduce possible noise

allow ipaliases to be configured on lo0

Fix variable name

remove openbgpd bits from system_gateways_edit and system.inc. The package
match is case-sensitive and hasn't matched the openbgpd package's name in
at least 5 years, so it doesn't do anything. It's far from functional in
any useful manner even fixing that issue.

Bring in proper gmirror support for the GUI and notifications.
Made a general gmirror library to perform various gmirror tasks and get information, using some of the former widget logic to start. Updated widget to use this new code.
Added a Diag > GEOM Mirrors page that displays information about existing mirrors and perform various management tasks. Current actions include rebuilding a drive, forgetting disconnected mirror drives, insert/remove, deactivate/activate, clearing medatada. It's now possible to use the GUI to rebuild a failed mirror by performing a forget, then insert action to replace a missing/dead drive....

client-config-dir is also useful when using OpenVPN's internal DHCP while bridging.

Include the v4 prefix on the v6 netmask to make routing more sane and alos tracking interface configurations work!