* aclocal.m4 (GROFF_PAGE): Don't use `prefix' directly since it

* aclocal.m4 (GROFF_PAGE): Don't use `prefix' directly since it
is not initialized at the time we need it in case `--prefix' hasn't
been set.  Check for `ac_default_prefix' also.
Test for `papersize' keyword also and generalize allowed whitespace.
* configure: Regenerated.

* font/devps/Makefile.sub (DESC): Use `papersize' instead of
`paperlength'.

* src/libs/libgroff/Makefile.sub (version, revision): Replaced
with...
(src_version, src_revision): New variables to avoid overwriting
from parent make process.
(version.cc): Updated.
* contrib/mom/Makefile.sub (groff_bin_dirs): Fix typo (forgotten
`src' element).

* src/preproc/html/pre-html.cc: Include paper.h and font.h.
(linebuf, linebufsize): New global variables.
(sys_fatal): Use `fatal' to abort properly.
(get_line): New function.
(get_resolution): Use it.
Improve error messages.
(get_papersize): Check `papersize' also.
Use `get_line'.
Improve error messages.