For (a multi-site) project which has more than one integration branch it wold be
nice to be able to poll for changes on more than one branch. Currently the
polling is done by issuing an cleartool lshistory command which accepts a
-branch <brtype> option. Unfortunately, lshistory only accepts one -branch
option. So monitoring multiple branches would require multiple calls to
lshistory which would cause additional delays is such an option would be
introduced...