* NEWS: Updated.

* NEWS: Updated.
* doc/groff.texinfo: Many fixes, additions, clarifications, etc.

* src/devices/grodvi/dvi.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/devices/grohtml/post-html.cc (main): Accept --help and --version.
Write --version output to stdout, not stderr.
(usage): Add stream argument. Don't exit.
* src/devices/grohtml-old/html.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/devices/grolbp/lbp.cc (long_options): Use symbolic getopt.h
constants.
(usage): Add stream argument. Don't exit.
(main): Write --help output to stdout, not stderr.
* src/devices/grolj4/lj4.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/devices/grops/ps.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/devices/grotty/tty.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/preproc/eqn/main.cc (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/preproc/grn/main.cc (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/preproc/html/pre-html.cc (usage): Add stream argument.
(scanArguments): Accept --help and --version.
* src/preproc/pic/main.cc (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/preproc/refer/refer.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/preproc/soelim/soelim.cc (usage): Add stream argument. Don't
exit.
(main): Accept --help and --version.
* src/preproc/tbl/main.cc (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/roff/groff/groff.cc (main): Accept --help and --version.
(synopsis): Add stream argument.
(help): Write --help output to stdout, not stderr.
(usage): Add stream argument. Don't exit.
* src/roff/grog/grog.pl: Accept --help and --version.
(help): New sub.
* src/roff/grog/grog.sh: Accept --help and --version.
* src/roff/nroff/nroff.sh: Accept --help and --version.
* src/roff/troff/input.cc (USAGE_EXIT_CODE): Remove macro.
(usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/utils/addftinfo/addftinfo.cc (main): Accept --help and --version.
(usage): New function with stream argument, doesn't exit.
* src/utils/hpftodit/hpftodit.cc (main): Accept --help and --version.
(usage): New function with stream argument, doesn't exit.
* src/utils/indxbib/indxbib.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.
* src/utils/lkbib/lkbib.cc (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/utils/lookbib/lookbib.cc (usage): Add stream argument. Don't
exit.
(main): Accept --help and --version.
* src/utils/pfbtops/pfbtops.c (usage): Add stream argument. Don't exit.
(main): Accept --help and --version.
* src/utils/tfmtodit/tfmtodit.cc (main): Accept --help and --version.
(usage): Add stream argument. Don't exit.