permanently redirect HTTP to HTTPS for nginx
add workaround for #170
add basic auth for all incoming requests
disable auth_basic for health checks
Fix Redis LRU cache default configuration backwards compatibility
Improve coverage of docker_registry.lib.layers
Merge pull request #462 from Aigeruth/enhancement/coverage

Improve coverage of docker_registry.lib.layers module.
Document that golang's implementation is limited
Merge pull request #467 from mika/master

Document that the golang implementation doesn't provide all the features
Improve coverage of docker_registry.lib

Docker-DCO-1.1-Signed-off-by: Gabor Nagy <mail@aigeruth.hu> (github: Aigeruth)
README.md: Restore SQLAlchemy docs and links

The explanation for sqlalchemy_index_database was removed in bb69c43f
(update documentation for config_sample.yml changes, 2014-05-14), and
the reference URL for search-endpoint was removed in 4ba12e5d (Updated
documentation for 0.7, new developer (contribute) doc, new changelog
file, 2014-05-20).

Since I added the links in fab832bf (search: Use SQLAlchemy as a
search-index backend, 2014-02-12), the search-endpoint URL has moved
from:

  http://docs.docker.io/en/latest/reference/api/index_api/#get--v1-search

to:

  http://docs.docker.com/reference/api/docker-io_api/#search

But I haven't tracked down the Docker-side commit responsible for that
move.
docker_registry.index: Remove local logger

This was added in d2ace65d (Naive mirroring implementation,
2014-02-06) in support of some
/v1/repositories/<path:repository>/images logging.  Those logs were
removed in bbb487a3 (Using mirroring decorator on index route,
2014-03-07), but this code was left behind.
Updated run.py to include env variables for logging gunicorn to files
Updated eny.py to include default logging to console / docker logs
Merge pull request #479 from wking/index-logger

docker_registry.index: Remove local logger
Merge pull request #472 from wking/readme-restore-sqlalchemy

README.md: Restore SQLAlchemy docs and links
Merge pull request #481 from Furze/master

Add environment variables for gunicorn logging
fix(logging): move up logging setup
fix yaml escape bug
Merge pull request #487 from deis/fix-yaml-bug

Fix YAML escape bug on Gunicorn log targets