migration/next for 20170922

# gpg: Signature made Fri 22 Sep 2017 13:15:06 BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20170922-1:
  migration: split ufd_version_check onto receive/request features part
  migration: fix hardcoded function name in error report
  migration: pass MigrationIncomingState* into migration check functions
  migration: split common postcopy out of ram postcopy
  migration: fix ram_save_pending
  migration: add has_postcopy savevm handler
  bitmap: provide to_le/from_le helpers
  bitmap: introduce bitmap_count_one()
  bitmap: remove BITOP_WORD()
  migration: Split migration_fd_process_incoming
  migration: Create multifd migration threads
  migration: Create x-multifd-page-count parameter
  migration: Create x-multifd-channels parameter
  migration: Add multifd capability
  migration: Create migration_has_all_channels
  migration: Add comments to channel functions
  migration: Teach it about G_SOURCE_REMOVE
  migration: Create migration_ioc_process_incoming()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>