add deprecation comment - now that we have a new guide.

doc only, no code, no review

string/doc/string-guide.html

@@ -10,7 +10,7 @@
 <!-- ----|---------|---------|---------|---------|---------|---------|---------| -->
 <!-- ...............................................................Front Matter -->
 <h1>an incomplete guide to <a class="exact-uri" href="http://lxr.mozilla.org/seamonkey/source/string/">mozilla/string</a></h1>
-
+    <h1><font color="red">This document is now deprecated in favor of <a href="http://www.mozilla.org/projects/xpcom/string-guide.html">The new string guide</a>.</font></h1>
 <div class="author-note">
   <p>by <a href="http://ScottCollins.net/">Scott Collins</a><!-- /p -->
   <p>last modified 8 April 2001<!-- /p -->

xpcom/string/doc/string-guide.html

@@ -10,7 +10,7 @@
 <!-- ----|---------|---------|---------|---------|---------|---------|---------| -->
 <!-- ...............................................................Front Matter -->
 <h1>an incomplete guide to <a class="exact-uri" href="http://lxr.mozilla.org/seamonkey/source/string/">mozilla/string</a></h1>
-
+    <h1><font color="red">This document is now deprecated in favor of <a href="http://www.mozilla.org/projects/xpcom/string-guide.html">The new string guide</a>.</font></h1>
 <div class="author-note">
   <p>by <a href="http://ScottCollins.net/">Scott Collins</a><!-- /p -->
   <p>last modified 8 April 2001<!-- /p -->