Uploading forms+files via Python script -- no luck

[Karl Ulbrich]

For anyone interested in the solution...  I screwed up something when
adapting my (working) starting point to the code I posted.  

The MIME boundary specified in the header starts with "-----" (this may be
an arbitrary number, but 5 works).  

However, boundaries in the BODY have to start with an extra 2 hyphens,
so they need to start with "-------".

Furthermore, the last boundary ends with an extra "--" in the working
code example I had.  

Strange but true MIME stuff.  I gave up on the RFC, so that's just a 
what-worked-for-me solution, assumed to be basically correct.

Karl Ulbrich