pfSense

This is 2020. Issue #9245

Fix copyright message years to reflect BSDP -> ESF -> Netgate

Fixed #9245 updating copyright notices

Update the Copyright notice for pfSense.

While I'm here, fix the case when the admin account has been removed.

When resetting admin account via /etc/rc.initial.password, Check if the admin account is expired and reset if needed. Fixes #7354

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)

Always use require_once

The usage of require() and require_once() throughout the system is
inconsistent, and "bugs" come up now and then when the order of
"requires" is a bit different and some require() happens after the
include file is already included/required....

Code style and white space in etc

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/