pfSense

Fix multiple issues on unbound advanced options GUI:

- Drop many wrong key assignments to pconfig
- Add missing keys to pconfig
- Deal fine with boolean parameters
- Mark subsystem dirty to require apply button
- Drop calls to enable_change()
- Remove unecessary js function enable_change()...

Allow hostnames in bulk import since they are valid entries in a network type alias.

Merge pull request #1242 from ExolonDX/branch_master_01

Fix PHP script closing tag placement.

Convert almost all /sbin/sysctl calls to php functions

Fix indent

Add missing $g to global, as noted on pull request 1249

Change Cancel button to call history.back() as done in Firewall Rules, the current method has issues with IE 11, it should fix #3728

Also check and verify the package server's SSL certificate if using HTTPS. Issue 484
Our current XMLRPC client version doesn't have support on its own to validate this in a way we can use to test in a usable for printing an error message. For now, a cURL query to the XMLRPC URL is used in its place.

More refinements to the unofficial package repository warning ( Issue #484 ) -- Now also shows on Dashboard and installed package list. Cleaned up some code and shuffled things around to avoid unnecessary repetition.