pfSense

This is 2020. Issue #9245

Fix random typos

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

Privilege matching -- allow JS anchors. Fixes #9550

Attempts to detect a special case where a file does not actually
exist, and yet should be allowed since it is used by JavaScript.

So long as the anchor name doesn't contain any characters that might let...

Strengthen path privilege check. Fixes #9513

• Removes/resolves any relative paths in the submitted URL
• Validates that the file exists
• Trims the path component off after in a nicer way

Update copyright notices to 2019. Happy New Year

Update the Copyright notice for pfSense.

auth_check, move the cmp_page_matches() to its own file so it can be shared by both auth_check.inc and priv.inc