Merge remote-tracking branch 'remotes/juanquintela/tags/migration-20211109-pull-reque...

Migration Pull request

Hi

This pull request includes:
- fix sample-pages doc by hyman
- cleanup colo pages by contiguous blocks by Rao
- reset auto-converge by checkpoint by Rao.

Please, apply.

# gpg: Signature made Tue 09 Nov 2021 09:02:37 AM CET
# gpg:                using RSA key 1899FF8EDEBF58CCEE034B82F487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>" [full]
# gpg:                 aka "Juan Quintela <quintela@trasno.org>" [full]

* remotes/juanquintela/tags/migration-20211109-pull-request:
  Reset the auto-converge counter at every checkpoint.
  Reduce the PVM stop time during Checkpoint
  docs: fix 'sample-pages' option tag

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>