Proper building and installation of documentation in the Makefiles.
Added `progspell' target which runs ispell on the progdoc SGML file withall function, variable and structure names removed.
do not overflow in .dvi
include filter documentation in the system
Clean LaTeX .aux and .toc files as well.
Modified the Makefile to work in the source tree.
From now, you can just `make userdocs' in doc, no need to use ugly scripts.
Also, `make progdocs' builds the programmer's documentation in HTML,LaTeX version to come later.
Use <m> instead of <i> in bird.sgml, fix url references.
Don't include Rules: they are not needed and break stand-alone make of documentation.
Connected the `doc' subtree to global makefiles.
All documentation is built in obj/doc (resp. doc/ if you do a stand-alone build).
Use `make docs' to make the whole documentation or `make userdocs' resp.`make progdocs' for user manual resp. developer's guide.
Include proto/rip/rip.c in documentation system.
Documentation-generating tool taken from linux-2.3.99-pre6, andmakefile to actually use it.
Few bugs removed from sgml, makefile added.