macosx hints file consolidation (trunk only)

get macosx down to one hints file (default tty, single user) for
 tty, x11, qt and single or multiple users
preliminary bits that might allow a macosx qt build

sys/unix/hints/linux

@@ -15,6 +15,7 @@ PREFIX=$(wildcard ~)/nh/install
 CFLAGS=-O -I../include -DNOTPARMDECL $(CFLAGS1)
 CFLAGS1=-DCOMPRESS=\"/bin/gzip\" -DCOMPRESS_EXTENSION=\".gz\"
 
+LINK=$(CC)
 
 WINSRC = $(WINTTYSRC)
 WINOBJ = $(WINTTYOBJ)