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

4.4BSD snapshot (revision 8.1); add 1993 to copyright

new doc.mk; document numbering changes for 4.4BSD

4.4BSD snapshot (revision 8.1)

4.4BSD snapshot (revision 8.1); add 1993 to copyright

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