bundle progress: offer best-guess deterministic progress information
This uses the same strategy as progress for pulls, estimating manifests
based on changeset count and estimating file count by files list in
each changeset.
$ echo '[Section]' >> $HGRCPATH
$ echo 'KeY = Case Sensitive' >> $HGRCPATH
$ echo 'key = lower case' >> $HGRCPATH
$ hg showconfig Section
Section.KeY=Case Sensitive
Section.key=lower case