Currently upas/fs plumbs modify messages only if the flag
changes are made by another imap connection. If the flag
changes are made within the running upas/fs no modify message
is plumbed.
This changes upas/fs to set the modify flag if we made the
change ourself. It also moves the flag setting before the
imap read, so that we don't clobber flag changes coming
from the imap server with our own flags.
(Thanks Tobias Heinicke)
8b59286ef1