ca cert no longer needs to be stored in struct smtpd
update my mail address and add myself to some files where I should own copyright
Use the CAfile parameter instead of hard-coded path.
Always test the envelope source, but consider authenticated envelopes as local.
introduce queue_init() to replace queue_backend_lookup() and
remove sc_queue from struct smtpd.
add profiling code for the queue backend.
collection of small optims
avoid useless mkdir if bucket already exists
add a queue_null backend
add scheduler_null
must create the directory
use rmdir, as unlink does not work on a directory
unlink -> rmdir
some knf