progress: add speed format This is not enabled by default, but the user can add it by setting progress.format. We might want to let the estimate format output a speed instead of an ETA if there is not total. Currently estimate just returns the empty string in that case.

debugbuilddag: output progress information

test-debugbuilddag: replace unneeded 'rm -rf' with 'rm -r'

hgrc.5: document positional arguments in aliases