path2ban 7.x-2.3

This release has two major improvements:

1. It forces Path2ban into either menu callback or hook mode. Previous versions could allow users to use both, potentially resulting in duplication.
2. It includes system status "requirements" to make sure that the settings are set correctly. On previous versions going back to 1.0 the user could delete the site_403 and site_404 entries, silently stopping Path2ban from working.

It has additional minor improvements:

3. The settings handling is much much better now, with watchdog log entries and user notifications for when the site_403 and site_404 settings are being overwritten by Path2ban.
4. Some extra entries into the banned list based on recent hack attempts.
5. More detailed filtering for settings.php snoop attempts.
6. Polite message suggesting users check their updated config (#3106393).
7. Clear the module registry when adding a new class source file (#3105803).