SLING-3735 - support JNDI lookup in JDBC DataSource Provider

Update the help doc

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1637804 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/datasource/internal/JNDIDataSourceFactory.java b/src/main/java/org/apache/sling/datasource/internal/JNDIDataSourceFactory.java
index 07108ec..925b548 100644
--- a/src/main/java/org/apache/sling/datasource/internal/JNDIDataSourceFactory.java
+++ b/src/main/java/org/apache/sling/datasource/internal/JNDIDataSourceFactory.java
@@ -71,7 +71,8 @@
     @Property(
             label = "JNDI Properties",
             description = "Set the environment for the JNDI InitialContext i.e. properties passed on to InitialContext " +
-                    "for performing the JNDI instance lookup",
+                    "for performing the JNDI instance lookup. Each row form a map entry where each row format be propertyName=property " +
+                    "e.g. java.naming.factory.initial=exampleFactory",
             value = {},
             cardinality = 1024)
     static final String PROP_JNDI_PROPS = "jndi.properties";