Add documentation for 'external_image_storage.s3' to explain how to specify the AWS region for the S3 bucket, and the requires S3/IAM permissions.

This reverts commit 99f1c300.

the org redirecter opened the body stream by misstake. Causing
downstream code to start reading from an empty stream and raise errors.

middlware: change org when url contains orgid

closes #6948
ref #1613

closes #7400

closes #7382

setup compiles the backend and caches it which is nice
when developing grafana since incremental compiles are
much faster. But its not required for building grafana.

* Hardcoded the most secured TLS options.

its now possible to turn of image uploading in alert notifications
for those who operate on very sensitive data.

closes #7419

ref #7541

Changes default from name in smtp settings
from Grafana Admin to Grafana.

Fix for integration test (which is skipped but that
did not work)

Updates mailer to include `from_name` value