Update copyright notices to 2019. Happy New Year
Update the Copyright notice for pfSense.
Fix auth_check.inc so it conforms to the rest of the session management code. While here, make sure it performs a commit to avoid PHP session gc from reaping the session. Fixes occasional timeouts when sitting on pages that only fetch AJAX for prolonged periods. Fixes #8116
auth_check, move the cmp_page_matches() to its own file so it can be shared by both auth_check.inc and priv.inc
auth_check lowers cpu usage for checking if the user has permission for the page requested when used in place of guiconfig, especially useful for frequent requests like those made by stats and traffic widgets