dispatch: assign I/O descriptors from the request to the ui

ui: use I/O descriptors internally and as a result: - fix webproto to redirect the ui descriptors instead of sys.stdout/err - fix sshserver to use the ui descriptors

dispatch: add I/O descriptors to the request

ui: add I/O descriptors

import: add --bypass option This feature is more a way to test patching without a working directory than something people asked about. Adding a --rev option to specify the parent patch revision would make it a little more useful. What this change introduces is patch.repobackend class which let patches be applied against repository revisions. The caller must supply a filestore object to receive patched content, which can be turned into a memctx with patch.makememctx() helper.

import: separate parents selection from working dir update This will be useful when patching without updating the dirstate