Fix private archiving
Fix private archiving

There was a bit of a logic flunk in the archiver, that meant private
emails were not properly marked as private. This has now been fixed.

rbowen/ponymail,quenda/ponymail,Humbedooh/ponymail,Humbedooh/ponymail,jimjag/ponymail,quenda/ponymail,jimjag/ponymail,jimjag/ponymail,jimjag/ponymail,quenda/ponymail,Humbedooh/ponymail,rbowen/ponymail,rbowen/ponymail