packaging: split downloading code into own module As we will introduce more code to support packaging, it will be useful to have download code in its own module. Differential Revision: https://phab.mercurial-scm.org/D6084

packaging: establish hgpackaging package Previously, contrib/packaging behaved as a root to a package directory and we had a "packagingutil" module. As I work more on packaging code, we'll want to have more code shared between different packaging tools. I think it makes sense to have a single package containing multiple modules than multiple top-level modules. This commit establishes an "hgpackaging" package by moving the existing packagingutil code to it. Differential Revision: https://phab.mercurial-scm.org/D6083

py3: use % instead of .format() on a bytestring Differential Revision: https://phab.mercurial-scm.org/D6112

py3: use r'' for group name arguments to MatchObjects in phabricator.py MatchObject group names are strings, not bytes. Using bytes in py3 leads to an IndexError. Differential Revision: https://phab.mercurial-scm.org/D6111

py3: use %d instead of %s when formatting an int into a byte string Differential Revision: https://phab.mercurial-scm.org/D6110

py3: only pass unicode to json.dumps in writediffproperties Differential Revision: https://phab.mercurial-scm.org/D6109

py3: fix a few "dict keys as str instead of bytes" issues in phabricator.py Differential Revision: https://phab.mercurial-scm.org/D6108

py3: convert URL to str before passing it to request Differential Revision: https://phab.mercurial-scm.org/D6106

py3: convert indexes into bytes when enumerating lists in urlencodenested Otherwise it'll try to insert them them into a %s slot in a b'' later and fail. Differential Revision: https://phab.mercurial-scm.org/D6105

py3: don't try and format a bare dict into a byte string in callconduit Differential Revision: https://phab.mercurial-scm.org/D6104