GUAC-716: Add password and password-regex parameters to telnet.

guacamole/src/main/resources/net/sourceforge/guacamole/net/protocols/telnet.xml

@@ -4,6 +4,10 @@
     <param name="port"     title="Port"     type="numeric"/>
 
     <param name="username" title="Username" type="text"/>
+    <param name="password" title="Password" type="password"/>
+
+    <param name="password-regex"
+           title="Password regular expression" type="text"/>
     
     <param name="font-name" title="Font name" type="text"/>
     <param name="font-size" title="Font size" type="enum">