Bug#936146: archivemail - Python 3 porting

[Scott Talbert]

archivemail seems to be a good candidate to RM due to dead upstream. 
However, it still has a relatively high popcon, so people seem to be using 
it.

I'm willing to take a stab at porting to Python 3 if anyone is available 
to test it?  The port effort doesn't look that bad at first glance, but I 
don't use this package.

Scott