Help with updating web manual.

* HACKING: Incorporate instructions from gnulib/doc/README.
* bootstrap.conf (gnulib_modules): Add gendocs.

doc/.gitignore

@@ -1,4 +1,6 @@
+/*.info*
 /Makefile
+/Makefile.in
 /bison.1
 /bison.aux
 /bison.cp
@@ -15,11 +17,10 @@
 /bison.tp
 /bison.vr
 /cross-options.texi
-/Makefile.in
+/gendocs_template
 /refcard.dvi
 /refcard.log
 /refcard.ps
-/*.info*
 /stamp-vti
 /version.texi
 /yacc.1