Megacommit of dozens of files.

Cleanup of redundant/useless header file inclusion.

ISC style lint, primarily for function declarations and standalone
comments -- ie, those that appear on a line without any code, which
should be written as follows:
   /*
    * This is a comment.
    */

lib/dns/rootns.c

@@ -17,15 +17,10 @@
 
 #include <config.h>
 
-#include <stddef.h>
-#include <string.h>
-
-#include <isc/assertions.h>
-#include <isc/error.h>
-#include <isc/types.h>
+#include <isc/buffer.h>
 #include <isc/util.h>
 
-#include <dns/types.h>
+#include <dns/callbacks.h>
 #include <dns/db.h>
 #include <dns/master.h>
 #include <dns/rootns.h>