GUACAMOLE-1239: Make identifier comparison case-insensitive.

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

@@ -328,5 +328,17 @@ public class SQLServerEnvironment extends JDBCEnvironment {
                 SQLServerGuacamoleProperties.SQLSERVER_TRUST_ALL_SERVER_CERTIFICATES,
                 false);
     }
+    
+    @Override
+    public boolean getCaseSensitiveUsernames() throws GuacamoleException {
+        
+        // SQL Server uses case-insensitive string searches by default, so
+        // we do not enforce case-sensitivity unless otherwise configured.
+        return getProperty(
+                SQLServerGuacamoleProperties.SQLSERVER_CASE_SENSITIVE_USERNAMES,
+                false
+        );
+        
+    }
 
 }

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

@@ -257,5 +257,13 @@ public class SQLServerGuacamoleProperties {
         public String getName() { return "sqlserver-trust-all-server-certificates"; }
 
     };
+    
+    public static final BooleanGuacamoleProperty SQLSERVER_CASE_SENSITIVE_USERNAMES =
+            new BooleanGuacamoleProperty() {
+                
+        @Override
+        public String getName() { return "sqlserver-case-sensitive-usernames" ; }
+                
+    };
 
 }