document all of detect_speech's valid syntax

src/mod/applications/mod_dptools/mod_dptools.c

@@ -28,6 +28,7 @@
  * Michael Murdock <mike at mmurdock dot org>
  * Neal Horman <neal at wanlink dot com>
  * Bret McDanel <trixter AT 0xdecafbad dot com>
+ * Luke Dashjr <luke@openmethods.com> (OpenMethods, LLC)
  *
  * mod_dptools.c -- Raw Audio File Streaming Application Module
  *
@@ -95,7 +96,7 @@ SWITCH_STANDARD_DIALPLAN(inline_dialplan_hunt)
 	return extension;
 }
 
-#define DETECT_SPEECH_SYNTAX "<mod_name> <gram_name> <gram_path> [<addr>] OR grammar <gram_name> [<path>] OR pause OR resume"
+#define DETECT_SPEECH_SYNTAX "<mod_name> <gram_name> <gram_path> [<addr>] OR grammar <gram_name> [<path>] OR nogrammar <gram_name> OR pause OR resume OR stop OR param <name> <value>"
 SWITCH_STANDARD_APP(detect_speech_function)
 {
 	char *argv[4];