fine tuning of permission model in:  - TICKET_APPEND  - TICKET_CHGPROP
fine tuning of permission model in:
 - TICKET_APPEND
 - TICKET_CHGPROP

So email2trac will honour the permission set by the trac permission model if set in email2trac.conf. see #214, #198


git-svn-id: e959ebe540f258281fb77864025b49ae95417172@474 51ba4ec3-dd23-0410-a888-bc9a71dd14c1

dscho/email2trac,dscho/email2trac,dscho/email2trac,dscho/email2trac