pfSense

This is 2020. Issue #9245

Update copyright notice years. Issue #9245

Update the Copyright notice for pfSense.

Fix #7968

Show Network Device ID in console banner

Do not show Serial when it's empty

Refactor get_configured_interface_with_descr remove unused parameter

Remove hideplatform global config and all uses of it

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)

Show patchlevel together with product version on banners and system information widget

Add a default case for IPv6 in rc.banner, otherwise whatever trips first gets used for the later interfaces as well.

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/