fix which /bin/csh returning .//bin/csh (adapted changes from the tcsh source)
forgot to check this in...
Fixes from Chris Demetriou and Charles Hannum
Changes from Charles Hannum (mycroft@netbsd.org) to use POSIX signals
page breaks for 4.4BSD manuals
update for the 4.4BSD manuals
avoid macro that makes ditroff die
avoid clobbering termios in setup_tty
copy edit nits
Kill foreground process group upon exit in phup()
4.4BSD snapshot (revision 8.1)
need -ms.
4.4BSD snapshot (revision 8.1); add 1993 to copyright
new doc.mk; document numbering changes for 4.4BSD
format and editing nits
changed _Q,_Q1 to _QF,_QB to avoid conflict with new <ctype.h>
Removed comment reference to non-existing file local.h
Removed extraneous OBJ+= line
Added missing \ in \*(ua in the operator section
Fixed gcc -Wall warnings
Removed gcc-1 -f optimization flags.
Changed the -21... to 0x80... to avoid integer overflow warnings
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