pfSense

Captive portal: use locking to avoid race conditions between rc.prunecaptiveportal and captiveportal_disconnect_all()

Convert rc.prunecaptiveportal to lock()/unlock()/try_lock() and use the lock to ensure that there aren't race conditions between it and captiveportal_disconnect_all().

Move copyright from ESF to Netgate

Move to Apache License 2.0

Review license / copyright on all files (final round)

Review license / copyright on all files (1st round)

Delete Id comment lines from etc files

A bit more crud cleaned out
Note: lots of the /etc files have old style copyright stuff or no
copyright stuff.

Move main pfSense content to src/