Merge #1107

1107: Parameterize redis address r=mergify[bot] a=mildred

## What type of PR?

bug-fix

## What does this PR do?

Allow redis on an hostname other than just `redis`

### Related issue(s)
none

## Prerequistes

- [ ] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/guide.html#changelog) entry file.


Co-authored-by: Mildred Ki'Lya <mildred-pub.git@mildred.fr>

CHANGELOG.md

@@ -19,6 +19,7 @@ v1.6.1 - unreleased
 - Bug: Implement mailustart to resolve webmail in admin ([#716](https://github.com/Mailu/Mailu/issues/716))
 - Bug: Rename cli commands and their options (replace "\_" with "-") ([#877](https://github.com/Mailu/Mailu/issues/877))
 - Bug: Fix typo in migration script ([#905](https://github.com/Mailu/Mailu/issues/905))
+- Bug: Fix redis hostname in admin
 
 v1.6.0 - 2019-01-18
 -------------------

core/admin/mailu/configuration.py

@@ -8,8 +8,8 @@ DEFAULT_CONFIG = {
     'BABEL_DEFAULT_LOCALE': 'en',
     'BABEL_DEFAULT_TIMEZONE': 'UTC',
     'BOOTSTRAP_SERVE_LOCAL': True,
-    'RATELIMIT_STORAGE_URL': 'redis://redis/2',
-    'QUOTA_STORAGE_URL': 'redis://redis/1',
+    'RATELIMIT_STORAGE_URL': 'redis://%s/2' % (os.getenv("REDIS_ADDRESS", "redis")),
+    'QUOTA_STORAGE_URL': 'redis://%s/1' % (os.getenv("REDIS_ADDRESS", "redis")),
     'DEBUG': False,
     'DOMAIN_REGISTRATION': False,
     'TEMPLATES_AUTO_RELOAD': True,