pfSense

Fix a lock leaking on CP.

• 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....

Propperly fix openvpn parameter parsing.

Fix correction of openvpn parameters.

Spit verbose messages on schedules only if in debug mode.

Remove from filter load the captive portal module loading and move it to the captive portal functions where is its only place. Keep only the pass rule for the CP webserver will see later on if it can be removed at all.

Comment out supposed diff code that is not being used.

Move validation of dyndns username to the only place it uses it, the GUI page. There it makes sense. While there add ':' character to allow NO-ip subaccounts.

Remove another unused function.

Use exec_command instead of custom rolled function. Fix some logic here and there.