Fix debates page issues with call time pass by reference

Deprecated in PHP 5.4
Disable php-xapian debuild tests as they fail on php 5.4

see http://trac.xapian.org/wiki/FAQ/PHP%20Bindings%20Package
Increase size of password field

PHP 5.4 changes the default crypt algorithim and it generates longer
strings so we need more space
Merge branch 'wheezy_changes'