Fix to 21512.

Added big note saying 'please disable security before trying to run
this' so nobody gets frustrated.

Updated sample component progid reference to actually match the .cpp.
Now the page actually works!  (John Morrison
<3jrgm@qlink.queensu.ca> caught this in mozilla.xpcom)

Thanks to Rick Bradley <roundeye@bellsouth.net> for pointing me to the
problem, and for encouraging me to add a note.

r=mccabe.  Not part of the build.

xpcom/sample/xpconnect-sample.html

@@ -10,6 +10,14 @@ Last modified Aug 4, 1999
 </center>
 
 <hr>
+NOTE: The example on this page currently won't work out of the box, because
+access to arbitrary XPConnect components through <tt>Components</tt>
+object is disabled for web-page JavaScript.  When we get our security
+story straightened out, we'll restore most access.  For now, you can get around
+it by finding '<tt>pref("security.checkxpconnect", <b>true</b>);'</tt> in the
+preferences file (<tt>all.js</tt>) and setting it to <tt><b>false</b></tt>.
+<hr>
+
 <p>In the spirit of "worse is better" this somewhat rough guide is being
 released to the world.  It will be expanded upon and improved.
 
@@ -115,7 +123,7 @@ printed is calculated in C++ code defined in <a href="http://lxr.mozilla.org/sea
 <!-- XXX keep in sync with stuff in pre tag below -->
 <script>
 /* to use nsSample.js version, use "mozilla.jssample.1" */
-var sample = Components.classes["component://mozilla/sample/sample-world"].createInstance();
+var sample = Components.classes["component://netscape/sample"].createInstance();
 sample = sample.QueryInterface(Components.interfaces.nsISample);
 dump("sample = " + sample + "\n");
 
@@ -161,7 +169,7 @@ JavaScript and form source:
 <pre>
 &lt;script&gt;
 /* to use nsSample.js version, use "mozilla.jssample.1" */
-var sample = Components.classes["component://mozilla/sample/sample-world"].createInstance();
+var sample = Components.classes["component://netscape/sample"].createInstance();
 sample = sample.QueryInterface(Components.interfaces.nsISample);
 dump("sample = " + sample + "\n");