Merge 1.5.2 changes back to master.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-sqlserver/src/main/java/org/apache/guacamole/auth/sqlserver/conf/SQLServerGuacamoleProperties.java

@@ -257,5 +257,17 @@ public class SQLServerGuacamoleProperties {
         public String getName() { return "sqlserver-trust-all-server-certificates"; }
 
     };
+    
+    /**
+     * The maximum number of identifiers/parameters to be included in a single batch when
+     * executing SQL statements.
+     */
+    public static final IntegerGuacamoleProperty SQLSERVER_BATCH_SIZE =
+            new IntegerGuacamoleProperty() {
+
+        @Override
+        public String getName() { return "sqlserver-batch-size"; }
+
+    };
 
 }