amend: allow amend of non-head when obsolete is enabled Obsolescence marker can represent this situation just fine. The old version is marked as precursor of the new changeset. All its descendants become "unstable". If obsolescence is not enabled we keep the current behavior of aborting. This new behavior only applies when obsolete is enabled and is subject to future discussion and changes.

obsolete: factorise troubles detection during push The use of the two methods introduced earlier allows a factorisation of the push code preventing push of troubled changeset.

obsolete: introduce a troubles method on context A troubled changeset may be affected by multiple trouble at the same time. This new method returns a list of all troubles affecting a changes.

obsolete: introduce a troubled method on context Allows to quickly check if a changeset is affected by any troubles. (troubles are: unstable, bumped and divergent)

tests: fix windows test failures

merge with stable

tests: fix windows test failures

largefiles: better test coverage of wireproto and the http protocol

largefiles: cleanup of warnings on errors getting largefiles Especially the "no default or default-push path set in hgrc" was often very misleading and didn't give any hint where it actually was looking. A long error messages is better than several multi-line messages.

largefiles: remove trivial portability wrappers