Issue #11467: Fix urlparse behavior when handling urls which contains scheme specific part only digits.

Before reading the code to check, I wasn't sure if it operated on
full domain names or just individual labels.

Patch by Amaury Forgeot d'Arc, updated by Sando Tosi.

Fix Issue11703 - urllib2.geturl() does not return correct url when the original url contains #fragment. Patch Contribution by Santoso Wijaya.

and on OS X with pydebug.

Mac OS X and FreeBSD to reduce the chances of a crash instead of a
"maximum recursion depth" RuntimeError exception.
(Patch by Ronald Oussoren)

Patch by Nadeem Vawda.

(EINTR), for example if the program is stopped with CTRL+z on Mac OS X. Patch
written by Charles-Francois Natali.

Not a complete fix for this issue.

dpkg-architecture command is not found on $PATH.  This should fix the failures
on FreeBSD and Solaris, which do not create the target file via I/O
redirection if the command isn't found (unlike Linux and OS X which do).

extending search paths to include multiarch directories.

Issue #10762: Guard against invalid/non-supported format string '%f' on Windows. Patch Santoso Wijaya.