pfSense

Improve input validation for services_dhcpv6_relay

Make the same imrovements as was done for services_dhcp_relay in commit https://github.com/pfsense/pfsense/commit/ac999f3b7894bd8d5fc35419a22cc2df39416e42

Do not allow a group name to start with 'pkg-', reserve it for packages use (e.g. tinc)

Update interface group name validation rules to match ifconfig

Fix #6976: Make sure interface description, interface name and alias don't have the same name

Ticket #6976: Check disabled interfaces

Fix CA input validation to (again) allow an import without a key. Fixes #7001

Update services_captiveportal.php

fixes https://redmine.pfsense.org/issues/6391

Improve input validation for services_dhcp_relay

While looking at interactions between DHCP Relay and DHCP Server, I noticed a few annoying/inconsistent things in driving the UI:
1) If there were validation errors on the Destination Server IP Addresses that the user input, messages would be given about invalid addresses but the data in the Destination Server row(s) would be reset to what it was before the user started editing, losing whatever they changes they had been trying to make so far....

move export button to heading for status monitoring page

Fix #6472: Enable/Disable associated firewall rule when NAT rule changes