> sounds like a good idea.   i poked at CVS, and it looks like
> it got removed from the old VM also when fvdl did the lite2 
> merge.   see lines 460 and 467 of:
> http://cvsweb.netbsd.org/bsdweb.cgi/syssrc/sys/vm/Attic/vm_mmap.c?annotate=1.63

Okay, I removed it.

However, I'm going to have to do more work on dlclose(3), because it's
just possible, especially on platforms where there is a large gap,
that something else could legitimately have been mapped in the hole.