pfSense

Fix potential bug in UPnP config.
If the shaper has never been used, the value being checked may not exist or not be an array.

Add traffic shaper queue field to UPnP config

Adding enablefields tag to enable/disable form elements

• Create two new functions lock($subsystem)/unlock() to have more reliable locking using semaphores.
  This function can sleep till the resource is free and can help find not well behaving code.
• Remove most of the config_lock/config_unlock logics on the whole scripts/pages it is an abuse of this....

don't kill routed unless it's running to avoid error in system log

• Hide interfaces internals to other code and use the propper interfaces.
  Basically use get_interface*() functions instead of accessing fields like 'ipaddr'/'descr' etc...
• Make get_interfaces_with_gateway less heavyweight by getting information from the configuration stored in config.xml...

Add (s)

• Rename get_current_wan_address to get_interface_ip
• Rename get_real_wan_interface to get_real_interface
• Simplify get_interface_ip by using find_interface_ip which should help in speed to since its using caching. Pointed by billm@
• Cleanup some code when passing or remove some unused one.

Rework most of the OpenVPN support. The interfaces have been updated to
not use the pkg system and the configuration has been migrated to an
openvpn prefix. The centralized user and certificate manager is now used
to support the openvpn configurations. Most of the files removed in this...

Eliminate interfaces_carp_bring_up_final()