!include modopts.d/*.ini by default

Updated comment block as well, fixing typos and providing a better description and example usage.

ctrl/modopts.ini

-; This file contains simple JS object defintions to enable/control the optional
-; behavior of various Synchronet stock and 3rd party JS modules (e.g. exec/*.js)
+; Contains simple JS object definitions to enable/control the optional
+; behavior of various Synchronet JS modules (e.g. exec/*.js)
 
-; Modules which use this file should use options=load("modopts.js","modname") first
+; Example use of this file (or its children) from a JavaScript module:
+; var options = load({}, "modopts.js", "modname");
+
+!include modopts.d/*.ini
 
 [login]
 ; Send password via email to user if they forget it and can't login