[MERGE] An SMTPConnection class for bzrlib (v2)

[Aaron Bentley]

Aaron Bentley has voted +1.
Status is now: Semi-approved
Comment:
Looks good to me.  Lately, when I'm comparing colletions and I don't 
care about their order, I've used sets.  But sorted is certainly good 
too.

I'll assume jam's +1 applies to this version, and submit.

For details, see: 
http://bundlebuggy.aaronbentley.com/request/%3C20070623013502.GA3659%40chistera.yi.org%3E