sshpeer: enable+fix warning about sshpeers not being closed explicitly
I recommend looking at this with a diff that ignores indentation.
The test changes are because localrepo.close() updates some cache,
which appears happens earlier now on rollbacks or strips or something.
The http changes are because httppeer.close() prints stats with
--verbose.
Differential Revision: https://phab.mercurial-scm.org/D9999
To run the tests, do:
cd tests/
python run-tests.py
See https://mercurial-scm.org/wiki/WritingTests for
more information on writing tests.