GUACAMOLE-622: Add parameter definitions for telnet login success/failure regex.

guacamole-ext/src/main/resources/org/apache/guacamole/protocols/telnet.json

@@ -27,9 +27,21 @@
                     "name"  : "password",
                     "type"  : "PASSWORD"
                 },
+                {
+                    "name"  : "username-regex",
+                    "type"  : "TEXT"
+                },
                 {
                     "name"  : "password-regex",
                     "type"  : "TEXT"
+                },
+                {
+                    "name"  : "login-success-regex",
+                    "type"  : "TEXT"
+                },
+                {
+                    "name"  : "login-failure-regex",
+                    "type"  : "TEXT"
                 }
             ]
         },