Add support for pull_gone configuration which allows you to pull in changesets that alter files that have been goned in the receiving repository.
Add support for pull_gone configuration which allows you to pull
in changesets that alter files that have been goned in the receiving
repository.

bk: 3ccd964btmdIGMp32SQKCYca6DzyJA
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper