Removed trailing white spaces

Removed trailing whitespaces with

```sh
for file in `grep -r " $" * | cut -d : -f 1 | sort | uniq | grep -v " "`; do sed -i 's/[ \t]*$//' $file; done
```

and some handwork.

modules/auth/ldap/README.md

@@ -13,7 +13,7 @@ If there's connection error, the server will be disabled and won't be checked ag
 
 ## Usage
 
-In the [security] section, set 
+In the [security] section, set
 >  LDAP_AUTH = true
 
 then for each LDAP source, set