[BUG][PATCH] fileid_involved fails to unescape xml characters

[John Arbash Meinel]

I tracked down the problem to the fileid function.
Basically, it is parsing the xml directly, and forgetting that some
characters (like <>) get escaped.

So I'm using xml.sax.saxutils.unescape to get them back into normal strings.
Unfortunately, this also means I had to move xml.py out of the way,
since it conflicts with the python system package 'xml'. (fortunately,
only xml4.py and xml5.py actually referenced the xml.py, so it was a
very localized move).
Long term, they all should probably be called something different.

The branch is available at:
http://bzr.arbash-meinel.com/branches/bzr/0.7-bugfix/

I also fixed the stub_server issue with paramiko > 1.5.2 (it now always
has attribute st_mode, just set to 0).

Attached is a combined patch
John
=:->
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