options `start' and `stop' now (unless I have forgotten any). This allows
us to call the scripts from /etc/rc.shutdown with the correct option.
The (42 or so) ports that already DTRT before are unchanged.
if the user wants to proceed (unless BATCH is set) at pre-fetch and
pre-install. Make the same query at pkg_add time.
While I'm at it,
- Move the URI to DESCR from Makefile.
- Replace a few = with ?=
- Instead of using echo in Makefile to create the sample startup
script, use a template.
