This is a patch for Bug 755031: If a null byte appears in 
a file name, Python zipfile.py retains it, but InfoZip 
terminates the name.  Null bytes in file names are used 
as a trick by viruses.  I tested WinZip, and it also 
truncates the file name at the null byte.

I am about 80% sure this patch is a good idea, but it 
does add a little more complexity.  If the consensus is 
that virus files are not Python's problem, I won't be 
offended if it is rejected.  It does seem useful to be 
consistent with WinZip and InfoZip.

The patch also fixes a buglet:  If a zipfile incorrectly 
uses a directory separator other than '/', there was an 
invalid complaint that the central directory name does 
not match the file header name.

I also removed my name from the top of the file.  It was 
there for legal reasons which I believe no longer apply.  
Many people have worked on this file besides me.

I don't believe there should be a test for null bytes in 
the zipfile.py test suite.

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Thanks Jim!  Your patch works for me, and the test still
passes.  I've checked it in on the trunk (rev 1.29, 1.30)
and backported it to release22-maint branch.