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/isc/sockaddr.c

@@ -17,18 +17,13 @@
 
 #include <config.h>
 
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
 #include <stdio.h>
 
-#include <isc/assertions.h>
 #include <isc/buffer.h>
-#include <isc/error.h>
 #include <isc/netaddr.h>
 #include <isc/region.h>
 #include <isc/sockaddr.h>
-#include <isc/types.h>
+#include <isc/string.h>
 #include <isc/util.h>
 
 isc_boolean_t