Merge branch 'master' of https://github.com/mailcow/mailcow-dockerized-docs

docs/firststeps-disable_ipv6.md

@@ -72,6 +72,7 @@ Create `data/conf/postfix/extra.cf` and set `smtp_address_preference` to `ipv4`:
 
 ```
 smtp_address_preference = ipv4
+inet_protocols = ipv4
 ```
 
 Restart Postfix:

docs/model-passwd.md

@@ -1,4 +1,4 @@
-# Fully supported hashing methods
+## Fully supported hashing methods
 
 The most current mailcow fully supports the following hashing methods.
 The default hashing method is written in bold: