git-browse-help?

The new 'git-browse-help' seems to purely be a helper script for "git
help" (judging from the commit messages and the lack of documentation).
Should it perhaps be "git--browse-help" or "git-help--browse" to follow
our "this is not for users" convention (see add--interactive,
fetch--tool, and rebase--interactive).

I became aware of it because "br" used to tab-complete "branch" but now
doesn't. :) And if we're going to change it, pre-1.5.4 is the time.

-Peff