more test suite

I got a bunch more tests working, so we're a lot closer now. There are only a couple of dozen tests not working (out of 275), for various reasons (a rough guess is half are because something or other in MacPerl is broken).

Here are the ones not working:

:io:argv.t
:io:fs.t
:io:inplace.t
:io:iprefix.t
:io:nargv.t
:io:open.t
:io:read.t
:lib:db-btree.t
:lib:db-hash.t
:lib:db-recno.t
:lib:dosglob.t
:lib:ftmp-mktemp.t
:lib:ftmp-posix.t
:lib:ftmp-security.t
:lib:ftmp-tempfile.t
:lib:io_xs.t
:lib:ndbm.t
:lib:posix.t
:lib:searchdict.t
:lib:tie-stdhandle.t
:op:die_exit.t
:op:lex_assign.t
:op:magic.t
:op:misc.t
:op:sprintf.t
:pod:find.t
:pod:pod2usage.t
:pod:podselect.t
:pragma:warnings.t

Many of the problems are bugs in sfio and GUSI. Some of them have other issues, and some of them I am unsure of, but am going to wait on until this wronly and rdwr stuff is figured out. For now, I am not touching any of these tests. They will sit as they are until the next GUSI is out. My next task is to commit current changes to CVS, then sync up with perforce again and do another round of patches, then commit all the new stuff to CVS. That's tomorrow.