SSL.File: Stricter type for backend_once().
SSL.File: Removed some dead code.
SSL.File: Removed some obsolete debug checks.

The current Pike backends support multiple concurrent threads running
the backend, so there's no purpose in these thread checks anymore.
Moved hash selection to the signer object.
Moved _Regexp_PCRE documentation to Regexp.PCRE.

Also mark up code segments in the documentation with @code.
Fixed XPM documentation, it is now visible

Also constified a constant and removed a comment.
Moved all _Image_JPEG documentation to Image.JPEG.
Documented the mission-critical Image.DSI module (Dream SNES image format)
Added a few notes about what an AVS file actually is.
Moved general format description from encode() to the module
Added a few notes about what ILBM is.
Added a few notes about what PCX is.
Actually document Image.WBMP.

Perhaps a few years to late.
Added a few more format notes

Also removed some trailing whitespaces
Make default signature hash more explicit.
Someone didn't test their changes.
Added basic documentation to Image.WebP.
Aded GLUT absolutely minimal autodoc

This is generated automatically, but if GLUT is not installed
on the computer the generation is skipped.

Thus, also check in the generated file.
Documentation tweaks for Shuffler

We should probably use this in at least Protocols.HTTP.Server, to test the code
if nothing else..
Some tweaks to the overwiev Fuse documentation