#10983: fix several bugs in the _tunnel implementation that seem to have missed while porting between branches.  A unittest is needed!

headers with iso-8859-1 (latin1) encoding.  It was already doing that for
incoming headers which makes this behaviour now consistent in both incoming and
outgoing direction.

This makes the implementation of PEP 3333 compliant servers on top of
BaseHTTPServer possible.

zipimport uses ASCII encoding instead of cp497 to decode filenames, at
bootstrap, if the codec registry is not ready yet. It is still possible to have
non-ASCII filenames using the Unicode flag (UTF-8 encoding) for file entries in
the ZIP file.

length.  Initial patch by Ross Lagerwall.

This fixes a regression introduced by r88022.

Split codecs into a separate section.  Rewrite
the Unicode section.

Time2Internaldate() documentation.  Thanks Joe Peterson for the report
and the original patch.

a symbol named FSTAT.

to show equivalent code, and to provide a use case.

Initial patch by Ross Lagerwall.