Add bovine manual to build process

Add bovine manual to build process

* doc/misc/bovine.texi: Small edits.  Set copyright to FSF, update license to
GFDL 1.3+, remove empty index.

* doc/misc/Makefile.in (INFO_TARGETS, DVI_TARGETS, PDF_TARGETS): Add bovine.
(bovine, $(buildinfodir)/bovine$(INFO_EXT), bovine.dvi, bovine.pdf):
New targets.

* doc/misc/makefile.w32-in (INFO_TARGETS, DVI_TARGETS, clean): Add bovine.
($(infodir)/bovine$(INFO_EXT), bovine.dvi): New targets.

* info/dir: Add bovine.