easy install and man-like behavior

[Stefan Monnier]

I have no trouble installing TeXinfo documentation and really like using
it, but I still have trouble when advocating it because it's a bit more
difficult to install and use than manpages.

I think the info program should allow more man-like usage:

- `cp foo.info /usr/local/info; info foo' should work.
  This means that `info foo' should find `foo' even if it's not in any
  `dir' file (just like the whatis database is not needed for man to find
  the manpage).

- `info libc scanf' should find the scanf entry in the index rather
  than complain that there is no menu entry for `scanf' in the toplevel
  of the `libc' manpage.

- A well-installed system should automatically update the dir files
  from a cron job, so that `cp foo.info /usr/local/info' is *really* all it
  takes to install an info document.
  This can be done right now, but I think that the distribution of texinfo
  should come with a sample such cron-script and should advertise it
  so that it seems natural to do it for someone who never even thought
  about it (as opposed to just making it possible/easy for someone who's
  been waiting for it).

- along the same lines, the cron job could even build the info files
  from texinfo files (like catman does for nroff->ascii), so that
  `cp foo.texi /usr/local/doc' is all it takes to install a documentation
  and get the info version, the dvi version, the pdf version,
  the html version, ...


        Stefan