Add an alert message to admin summary page when a PHP version < 5.4 was
detected as this has reached EOL and will not be supported with the new
SabreDAV library.
Some styleguide optimisation.
Add NULL_DATE example to doc/sql_conventions.bb.
Display a "0" when no plugins active in summary page.
Added some more numbers to summary admin page, expired accounts,
channels. Hope I interpreted them right. I have no idea how to get
blocked accounts.