Merge branch 'ew/connect-verbose'

Merge branch 'ew/connect-verbose'

There were a few "now I am doing this thing" progress messages in
the TCP connection code that can be triggered by setting a verbose
option internally in the code, but "git fetch -v" and friends never
passed the verbose option down to that codepath.

There was a brief discussion about the impact on the end-user
experience by not limiting this to "fetch -v -v", but I think the
conclusion is that this is OK to enable with a single "-v" as it is
not too noisy.

* ew/connect-verbose:
  pass transport verbosity down to git_connect