Fix more Slack community links

Author: Simran-B

.htmltest-external.yml

@@ -32,7 +32,7 @@ IgnoreURLs:
   - ^https://github\.com/ArangoDB/ArangoDB/issues$ # Social link
   - ^http://stackoverflow\.com/questions/tagged/arangodb$ # Social link
   - ^https://groups\.google\.com/forum/#!forum/arangodb$ # Social link
-  - ^https://slack.arangodb.com$ # Social link
+  - ^https://arangodb-community\.slack\.com$ # Social link
   - ^https://arangodb\.com/$ # Logo link
 #IgnoreDirs:
 #IgnoreInternalEmptyHash: false
@@ -55,3 +55,4 @@ ExternalTimeout: 60
 #OutputCacheFile: refcache.json
 #OutputLogFile: htmltest.log
 #CacheExpires: 336h
+#RedirectLimit: 0 # Requires htmltest version 0.18.0+ (currently unreleased)

3.7/index.md

@@ -65,7 +65,7 @@ If you have questions regarding ArangoDB, Foxx, drivers, or this documentation d
   and misbehavior or [pull requests](https://www.arangodb.com/community/){:target="_blank"}
 - [Google Groups](https://groups.google.com/forum/?hl=de#!forum/arangodb){:target="_blank"} for discussions about ArangoDB in general or to announce your new Foxx App
 - [StackOverflow](http://stackoverflow.com/questions/tagged/arangodb){:target="_blank"} for questions about AQL, usage scenarios etc.
-- [Slack](http://slack.arangodb.com){:target="_blank"}, our community chat
+- [Slack](https://arangodb-community.slack.com){:target="_blank"}, our community chat
 
 When reporting issues, please describe:
 

3.8/index.md

@@ -65,7 +65,7 @@ If you have questions regarding ArangoDB, Foxx, drivers, or this documentation d
   and misbehavior or [pull requests](https://www.arangodb.com/community/){:target="_blank"}
 - [Google Groups](https://groups.google.com/forum/?hl=de#!forum/arangodb){:target="_blank"} for discussions about ArangoDB in general or to announce your new Foxx App
 - [StackOverflow](http://stackoverflow.com/questions/tagged/arangodb){:target="_blank"} for questions about AQL, usage scenarios etc.
-- [Slack](http://slack.arangodb.com){:target="_blank"}, our community chat
+- [Slack](https://arangodb-community.slack.com){:target="_blank"}, our community chat
 
 When reporting issues, please describe:
 

3.9/index.md

@@ -65,7 +65,7 @@ If you have questions regarding ArangoDB, Foxx, drivers, or this documentation d
   and misbehavior or [pull requests](https://www.arangodb.com/community/){:target="_blank"}
 - [Google Groups](https://groups.google.com/forum/?hl=de#!forum/arangodb){:target="_blank"} for discussions about ArangoDB in general or to announce your new Foxx App
 - [StackOverflow](http://stackoverflow.com/questions/tagged/arangodb){:target="_blank"} for questions about AQL, usage scenarios etc.
-- [Slack](http://slack.arangodb.com){:target="_blank"}, our community chat
+- [Slack](https://arangodb-community.slack.com){:target="_blank"}, our community chat
 
 When reporting issues, please describe: