sntp includes a copy of libopts in itself in vendor code, rewrite the
Makefile to compile and use only one copy. It is an internal library, not
installed.
MFC after: 2 weeks
This is the second part of the commit (the third -- link in usr.sbin/Makefile)
will be done after a more complete review by phk & obrien.
NOTE: the number of drivers included in the default configuration is very
minimal, mainly local clocks and the one I use RAWDCF. Anyone wanting to
have a more complete version will find recompilation very easy.
It builds and runs on both alpha & i386. It also does survive "make world".
Reviewed by: phk, obrien (partly)
