SLING-8602 - point to the Jackrabbit docs for principal-based ACL

src/test/resources/testcases/test-33.txt

diff --git a/src/test/resources/testcases/test-33.txt b/src/test/resources/testcases/test-33.txt
index 70ef92f..846d0b5 100644
--- a/src/test/resources/testcases/test-33.txt
+++ b/src/test/resources/testcases/test-33.txt
@@ -3,6 +3,8 @@
 # o.a.s.jcr.repoinit 1.1.14
 # precondition for o.a.s.jcr.repoinit: 
 # repository needs to support 'o.a.j.api.security.authorization.PrincipalAccessControlList'
+# Also, this only works for users selected by the Jackrabbit/Oak FilterProvider, see
+# https://jackrabbit.apache.org/oak/docs/security/authorization/principalbased.html#configuration
 
 set principal ACL for principal1,principal2
     remove * on /libs,/apps
@@ -30,7 +32,7 @@
     allow jcr:something on / restriction(rep:glob)
 end
 
-# Principal-baesd ACL syntax with options (SLING-6423)
+# Principal-based ACL syntax with options (SLING-6423)
 set principal ACL for principal1,principal2 (ACLOptions=mergePreserve)
     remove * on /libs,/apps
     allow jcr:read on /content