transplant: avoid the word "rebase" when we mean "transplant"

transplant: explain that changesets are copied, not moved

hg: add support for cloning bookmarks

httprepo: use caps instead of between for compat check We usually query the capabilities at some point anyway so this way the first roundtrip actually does useful work.

revset: add a revset command to get bisect state.

bisect: new command to extend the bisect range (issue2690) When bisect ends in a merge point, and one of the parent wasn't checked, this usually means the culprit is in a branch that wasn't scanned. For this case we provide a new command which extends the range of the bisect search to the common ancestor of the parents of the merge.

hgweb: pmezard thinks one default is enough

don't depend on features of Exception as much BaseException.message has been deprecated, so we try to not rely on it.