[FIX] forums: Message-ID header cannot be set using the Zend addHeader method any more, need to use setMessageId (will still throw an exception if the message-id has been set previously). Fixes WSoD in forums when using "Forward messages to..." mailing list sync feature.
[FIX] forums: Message-ID header cannot be set using the Zend addHeader method any more, need to use setMessageId (will still throw an exception if the message-id has been set previously).
Fixes WSoD in forums when using "Forward messages to..." mailing list sync feature.

git-svn-id: 3582b35ee56d9e99405df4322499343324934860@52686 b456876b-0849-0410-b77d-98878d47e9d5

tikiorg/tiki,changi67/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki,changi67/tiki,tikiorg/tiki,oregional/tiki,changi67/tiki,oregional/tiki,tikiorg/tiki,oregional/tiki,oregional/tiki