* aclocal.m4 (GROFF_X11): s/have_no_x/groff_no_x/.

* aclocal.m4 (GROFF_X11): s/have_no_x/groff_no_x/.
Add X11 stuff to CFLAGS, LDFLAGS, and LIBS temporarily.
Add test for Xmu library.
(GROFF_APPRESDIR_OPTION, GROFF_APPRESDIR_CHECK,
GROFF_APPRESDIR_DEFAULT): New macros.

* configure.ac: Call GROFF_APPRESDIR_OPTION, GROFF_APPRESDIR_CHECK,
and GROFF_APPRESDIR_DEFAULT.

* configure: Regenerated.

* Makefile.in (appresdir): New variable.
(MDEFINES): Add appresdir.

* src/devices/xditview/Makefile.sub (EXTRA_LDFLAGS): Add -Xmu and
-Xt.
(install_data, uninstall_sub): New targets to handle GXditview.ad.

* src/utils/indxbib/Makefiles.ub (install_data): Depend on
`$(srcdir)/eign', not `eign'.

* MANIFEST, INSTALL, NEWS, PROBLEMS: Updated.

* man/groff_out.man, man/roff.man, src/devices/grops/grops.man,
src/devices/xditview/gxditview.man, src/roff/groff/groff.man:
Protect (g)xditview with `\%' to avoid hyphenation.
Other minor formatting.