pfSense

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

Fix #3725:

- Fix match_filter_field() and also simplify logic
- Fix $filterfieldsarray initialization
- Avoid to have double spaces on filterfieldsarray['act']
- Fix filter on Firewall Logs

Merge pull request #1208 from razzfazz/nat_add_missing_protocols

Remove also . and / from graph

Fix status_rrd_graph_img.php and also improve it:

- Remove escapeshellarg that broke command line
- Only remove dangerous chars to avoid command injection
- Replace all `hostname` calls by php_uname('n')
- Replace all `date` calls by strftime()
- Add $_gb to collect possibly garbage from exec return

Make sure single quotes are encoded and avoid javascript injection

Use CDATA for javascript

Fix indent and whitespaces

Simplify logic, add some protection to user input parameters

Fix whitespaces and indent