progress bars for commit a bit noisy in non-interactive mode

[Wichmann, Mats D]

>Wichmann, Mats D wrote:
>> The build logs have been full of lines and lines of pointless dots
>> until we started calling with "--quiet"...
>
>If you just want to disable the dots, you can do that by setting
>BZR_PROGRESS_BAR=none

ah, okay.  I missed that one (possibly because it
doesn't appear in the manpage :-)

-- mats