pfSense

Ticket #876. Show all gateways even though apinger is not monitoring them, for various reasons, this removes user confusion in the status pages.

Ticket #876. Add the ip to the respective files on ppp linkup event so the code of dynamic gateways finds them. Also reorganize/simplify/optimize the apinger config generation code. Do not use that 127.0.0.x hack anymore and avoid loops as much as possible.

On vpn_pptp.php only unset variables that are set.

Converted all print() statements to echo() and also added 2 new XML tags for packages to create an 'Advanced Features' section.
Tags are <advanced_options/> and <advancedfield/> which when enabled will add the advanced field into the new advanced section and also gives it a shiny new 'Advanced' button to click.

Typo: choosen -> chosen

Fix variable name typo in status_services.php and fix return value of is_pid_running. Fixes #877

Fix hyphen validation for host name on Services: DHCP: Edit static mapping page.

Provide a button to reload the filter at status->filter reload status.

Do the check regarding 'none' configured interfaces properly. This fixes breakage on VIP configuration. Reported-by: http://forum.pfsense.org/index.php/topic,28120.0.html

Use the new events mechanisms to dispatch events.