Added "Internet Config" to index.

Doc/mac/libmacic.tex

@@ -6,7 +6,8 @@
 \modulesynopsis{Access to Internet Config.}
 
 
-This module provides access to Macintosh Internet Config package,
+This module provides access to Macintosh Internet
+Config\index{Internet Config} package,
 which stores preferences for Internet programs such as mail address,
 default homepage, etc. Also, Internet Config contains an elaborate set
 of mappings from Macintosh creator/type codes to foreign filename