pfSense

Update the Copyright year.

A subsequent commit will deal with .po's.

Add product_label global variable

Introduce product_label global variable, by default with same value of
product_name. The idea is to make it easier for rebranded products to
change the name on all visual texts while internal structures are
preserved.

While here, remove deprecated $g['platform'] and also replace places...

Do not reset/reassign interfaces in certain cases. Fixes #10383

Same gateway naming convention for the console and the WebGUI. Issue #10264

This is 2020. Issue #9245

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

Fixed #9245 updating copyright notices

Fix #9144: Init array before use

Fix #9121: Initialize arrays to prevent PHP 7 errors

PHP 7 migration Added () for isset. Not sure how this worked in php 5

Gateways, allow for configuring a gatewaygroup as the default gateway.
-Avoid changing routes by just visiting a webgui page.
-Avoid change some unneeded events when nothing changed.

Update the Copyright notice for pfSense.

Accept 'IP/mask' notation in 'Set interface IP address' from initial menu, there is no need to force use to enter the netmask in a different input.

Refactor get_configured_interface_with_descr remove unused parameter

Code with multiple %s in etc

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/