subrepo: detect issue3781 case earlier so it apply to bundle2 We are doing some strange special casing of phase push when: - the source is a subrepo - the destination is publishing - some changeset are still draft on the destination In that case we do not push phases information (to publish the draft changesets) because it could break simple cycle of 'clone/pull/push' of subrepos. We have to detect this case earlier to have bundle2 respecting it. We change the test to check the behavior for both bundle1 and bundle2.

bundle2: hide bundle2 stream debug under a config flag The old output is very verbose and unsuitable for general debug level. It is however very useful for debugging bundle2 generation or consumption issues. All this verbose ouput is hidden under a 'devel.bundle2.debug' flag.

bundle2: add generic debug output regarding processed interruption If we are about to hide the detailed debug output, we need some generic debug message to replace it in a concise way.