Change the shebang line from /bin/sh to /bin/ksh in all base rc.d
daemon scripts.

discussed with and OK aja@
OK tb

Remove setproctitle() for the parent process. Because rc.d(8) uses process
titles (including flags) to distinguish between daemons, this makes it
possible to manage multiple copies of a daemon using the normal infrastructure
by symlinking rc.d scripts to a new name. ok jung@ ajacoutot@, smtpd ok gilles@

Enable npppd and npppctl in default build. Add npppd to rc and
install sample configs to /etc/.

ok claudio deraadt henning mcbride