Added missing bbl step to set up the SOCKS5 proxy

[markround]

Without this step, the following steps (alias, log-in etc.) do not work.

[cfdreddbot]

Hey markround!

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[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/154362684

The labels on this github issue will be updated when the story is started.