Log Message:
On Linux, define NEEDS_STRLCPY in MAKE_ENV.

In the patched Makefile, switch on NEEDS_STRLCPY instead of OPSYS,
because OPSYS isn't defined in my world (vanilla netbsd-5 on i386),
and I can't find any reason it should be.

Add a comment to the patch explaining why the install: target was
removed, and about NEEDS_STRLCPY.