when files may have hard links to a a name that only differs by case
- change install to unconditionally remove its temporary file
when installing hard links with -r. This avoids problems when
built with posix rename(2) semantics and reinstalling an existing
hard link.
- rework hard link targets in bsd.man.mk and bsd.links.mk
to use makefile constructs instead of shell constructs
- always reinstall hard links that may have case conflicts, even
when MKUPDATE=yes, this ensures that they get added to METALOG
- remove man pages which were hard linked to themselves in libform
- remove improper hard link command for existing man page in libkrb5
- fix libl's makefile to include bsd.lib.mk at end
- remove shell quoting in link target for test's [.1 man page
dbj