Logical markup, methoddesc, etc.

Added index entries.

Markup nits.

Index entries.

reported by Samuel L. Bayer.

Use methoddesc instead of funcdesc, etc.

	\setindexsubitem{(in module frobnitz)}

These are no longer needed when present before any other \setindexsubitem{}
in the module section.  The indexsubitem is now set by \bimodindex and
\stmodindex.

Add dependency on libfileinput.tex for lib.dvi.

wrapping of long lines, which tools/indfix.py doesn't understand, and needs
to to handle collapsing of entries which can share a common emtry and just
be short entries themselves.  We get the added benefit of nicer formatting.

just not here yet.

used as a closing quote.  At AMK's request.

and not to C's stderr.

mostly for jpython.

(a newline that the grammar ignores).

otherwise don't look like headers at all...
Also robustify the test code a bit.

  guess the mime type of a local file.

Change suggested by Sjoerd (with different implementation):
  when retrieve() creates a temporary file, preserve the suffix.

Corrollary of the first change:
  also return the mime type of a local file in retrieve().