SONAR-5000 add comments to sonar.properties

sonar-application/src/main/assembly/conf/sonar.properties

@@ -46,12 +46,14 @@ sonar.jdbc.url=jdbc:h2:tcp://localhost:9092/sonar
 # - It's recommended to use the latest version of the JDBC driver (ojdbc6.jar).
 #   Download it in http://www.oracle.com/technetwork/database/enterprise-edition/jdbc-112010-090769.html
 # - Copy the driver to the directory extensions/jdbc-driver/oracle/
+# - If you need to set the schema, please refer to http://jira.codehaus.org/browse/SONAR-5000
 # - Comment the embedded database and uncomment the following line:
 #sonar.jdbc.url=jdbc:oracle:thin:@localhost/XE
 
 
 #----- PostgreSQL 8.x/9.x
-# Comment the embedded database and uncomment the following property to use PostgreSQL
+# Comment the embedded database and uncomment the following property to use PostgreSQL.
+# If you don't use the schema named "public", please refer to http://jira.codehaus.org/browse/SONAR-5000
 #sonar.jdbc.url=jdbc:postgresql://localhost/sonar