* Fixed bugs introduced in revision 1.564 by rob ;)

* Fixed bugs introduced in revision 1.564 by rob ;)
  - Changed back to using if $x === false, if ($x) is a logic error in this
    case because PHP thinks (among other things) that (int)0 and (string)0 are
	false, so a custom signiture that was "0" would fail
  - $nick was changed to $nickname in 1.564 in most places, but not all, as a
    result no fancy signiture worked (feature?;) and php vomited E_NOTICE
  - $name => $username, same thing as above, variable name change where not all
    of them were changed resulting in E_NOTICE etc. etc.