Fix issue where too big message data was stored in cache causing sql errors (#1489316)

Conflicts:

	CHANGELOG
Make identities matching case insensitive (#1485480)
Move these two fixes to the 0.9.4 release
Fix error_reporting directive check (#1489323)

Conflicts:

	CHANGELOG
	program/lib/Roundcube/bootstrap.php
Apply various IPAX fixes and add cleanup.sh script
Add IPAX configuration files
Temporary CSS fix