Remove documentation of modifying StrictACLs, inform of change

Author: MartinFlores751

docs/system_overview/troubleshooting.md

@@ -379,7 +379,7 @@ This error can occur when an iRODS user tries to access an iRODS Data Object or
 
 With the more restrictive "StrictACL" policy being turned "on" by default in iRODS 4.0+, this may occur more often than expected with iRODS 3.x.  Check the permissions carefully and use `ils -AL` to help diagnose what permissions *are* set for the Data Objects and Collections of interest.
 
-Modifying the "StrictACL" setting in the iRODS server's `core.re` file will apply the policy permanently; applying the policy via `irule` will have an impact only during the execution of that particular rule.
+"StrictACL" is now always "on" and cannot be turned "off" as of iRODS 5.0.
 
 ## Credentials