[krbdev.mit.edu #3014] texinfo variable fixes, info dir entries

[Public Submitter via RT]

Hello folks,

The attached patch adds dir entries to the texinfo documentation so that
one can easily install the resulting info pages properly.  While working
on this, I also found a couple of typo'd variables in the texinfo
documentation, which this patch also fixes.

BTW, I recommend updating texinfo.tex to the latest version from
ftp.gnu.org as well.  The version in the doc tree is antediluvian, and
the documentation builds fine with the current version.  (You may also
want to add --no-split to the makeinfo --html rules, if you want to
preserve the current single-page HTML files.)