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.