Fix r299162
share/man/man8/Makefile:
- Add src.opts.mk so MK_NIS can be tested
- Fix typo in MK_NIS conditional
tools/build/mk/OptionalObsoleteFiles.inc:
- Remove WIP diff from ^/user/ngie/detangle-rc
MFC after: 1 week
X-MFC with: r299162
Sponsored by: EMC / Isilon Storage Division