feat(server side png rendering): added timezone parameter for server side rendering, refactoring PR #7264

Merge branch 'time-offset-to-image' of https://github.com/ryu1-sakai/grafana into ryu1-sakai-time-offset-to-image

* [3743] Adds support for user search based on login or email

* Use query parameter instead

* Use macaron Query() instead

This should have been removed in 06440ef5, but was probably forgotten.

Solves #6718.

feat(packaging): Make config file not part of package to simplify upgrade, made commit always a short sha, changed RESTART_ON_UPGRADE to true by default, #7399, #7227

Disable sign out for AuthProxyEnabled

Sign out was disabled for AuthProxyEnabled in #3122.  This is to catch the one other instance of a sign out link in the side menu.

fix(http api): throw validation error if missing property in call to /api/admin/users/123/permissions, #7365

* Elasticsearch - Term aggregation limit fix  (should fix #7112)

* Elasticsearch - Term aggregation limit fix