Proposed changes to jsdIDebuggerService and friends

Please take a look at
Modernize jsdIDebuggerService
https://bugzilla.mozilla.org/show_bug.cgi?id=449452
for links to several bug reports outlining improvements in jsd.

Of the possible ways to proceed, I am inclined to push for

Bug 379410 – debugger script detection using parent JSScript

or if this is too hard, then a limited version of

Bug 449454 – [jsd] Add frame argument to every jsd callback, eg 
jsdIScriptHook

John.