Test wire protocol unbundle with hashed heads (capability: unbundlehash)

Create a remote repository.

  $ hg init remote

  $ hg serve -R remote --config web.push_ssl=False --config web.allow_push=* -p $HGPORT -d --pid-file=hg1.pid -E error.log -A access.log

  $ cat hg1.pid >> $DAEMON_PIDS

Clone the repository and push a change.

  $ hg clone http://localhost:$HGPORT/ local

  no changes found

  updating to branch default

  0 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ touch local/README

  $ hg ci -R local -A -m hoge

  adding README

  $ hg push -R local

  pushing to http://localhost:$HGPORT/

  searching for changes

  remote: adding changesets

  remote: adding manifests

  remote: adding file changes

  remote: added 1 changesets with 1 changes to 1 files

Ensure hashed heads format is used.

The hash here is always the same since the remote repository only has the null head.

  $ cat access.log | grep unbundle

  * - - [*] "POST /?cmd=unbundle HTTP/1.1" 200 - x-hgarg-1:heads=686173686564+6768033e216468247bd031a0a2d9876d79818f8f (glob)