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.
    */

bin/tests/sockaddr/t_sockaddr.c

@@ -17,15 +17,7 @@
 
 #include <config.h>
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <isc/assertions.h>
-#include <isc/error.h>
-#include <isc/mem.h>
 #include <isc/netaddr.h>
-#include <isc/result.h>
 #include <isc/sockaddr.h>
 
 #include <tests/t_api.h>