minor #3566 Changes ACL permission setting hints (MicheleOnGit)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #3566).

Discussion
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Changes ACL permission setting hints

The default behavior of setfacl is to recalculate the ACL mask entry, unless a mask entry was explicitly given.

Commits
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4480eff Changes ACL permission setting hints

book/installation.rst

@@ -247,8 +247,8 @@ If there are any issues, correct them now before moving on.
     .. code-block:: bash
 
 		$ APACHEUSER=`ps aux | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data' | grep -v root | head -1 | cut -d\  -f1`
-		$ sudo setfacl -R -m u:"$APACHEUSER":rwX -m u:`whoami`:rwX app/cache app/logs
-		$ sudo setfacl -dR -m u:"$APACHEUSER":rwX -m u:`whoami`:rwX app/cache app/logs
+		$ sudo setfacl -Rn -m u:"$APACHEUSER":rwX -m u:`whoami`:rwX app/cache app/logs
+		$ sudo setfacl -dRn -m u:"$APACHEUSER":rwX -m u:`whoami`:rwX app/cache app/logs
 
     **3. Without using ACL**