bug #3716 Fix issue #3712 (umpirsky)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #3716).

Discussion
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Fix issue #3712

Commits
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90f0a1f Alternative -n option
4446902 Fix issue #3712

book/installation.rst

@@ -249,8 +249,10 @@ If there are any issues, correct them now before moving on.
     .. code-block:: bash
 
 		$ HTTPDUSER=`ps aux | grep -E '[a]pache|[h]ttpd|[_]www|[w]ww-data|[n]ginx' | grep -v root | head -1 | cut -d\  -f1`
-		$ sudo setfacl -Rn -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX app/cache app/logs
-		$ sudo setfacl -dRn -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX app/cache app/logs
+		$ sudo setfacl -R -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX app/cache app/logs
+		$ sudo setfacl -dR -m u:"$HTTPDUSER":rwX -m u:`whoami`:rwX app/cache app/logs
+
+    If this doesn't work, try adding ``-n`` option.
 
     **3. Without using ACL**