- FIXME
- signal handler to catch EINTR and segfaults
- improve sendmail.m4 templates

    **** DEVELOPMENT INFORMATION ****

  Proposal for future URL-style logging option syntax
  -L streamlog
  -l syslog:[mask]//[localhost[:port]][/tag=value ...] with /tag=value i.e. facility=local0
  -l   smtp:[mask]//[localhost[:port]][/tag=value ...] with /tag=value i.e. to=foo@example.com
  -l   file:[mask]//path/file

  Debugging:
  $ ./.configure [wegen --with-dmalloc!]
  $ dmalloc -l dmalloc.log
  $ dmalloc debug3