Code review comment for lp:~alecu/ubuntuone-client/proxy-tunnel-process

Looks great, two small observations that don't need any changes on this branch:

1. if we pass too many arguments to tunnel_server.py, we'll get strange errors, but since it doesn't look like anything users will ever call themselves, it's probably fine.

2. The new Python 3 style formatting is nice, but it means we need 2.7+ for this to work (which may already be a requirement,) but also, it's reportedly *way* less efficient than the old string formatting syntax, and there are no plans to ever remove that from the language, which makes me think we should probably just stick with the old one.