105:
Rework branch name alias handling.
Now we treat branches and magic branches different for the sake
of guessing branch name aliases.
Add the possibility to ignore branches based on regexp.
104:
Try to enhance branch handling, add diagnostic output.
Get DISTFILE from original MASTER_SITE. (effectively a package version
downgrade, but it is only a few hours old.)
Update to changeset 99:
Abort if the commit didn't succeed.