Fix error handling in queue/qmail-queue.
Add option to queue/qmail-queue to specify an alternate qmail-queue
location.
Add support for the QMAILQUEUE environment variable.
PPerl compatibility (yay!)
git-svn-id: https://svn.perl.org/qpsmtpd/trunk@110 958fd67b-6ff1-0310-b445-bb7760255be9