netfilter: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

include/uapi/linux/netfilter/xt_connmark.h

@@ -4,7 +4,7 @@
 
 #include <linux/types.h>
 
-/* Copyright (C) 2002,2004 MARA Systems AB <http://www.marasystems.com>
+/* Copyright (C) 2002,2004 MARA Systems AB <https://www.marasystems.com>
  * by Henrik Nordstrom <hno@marasystems.com>
  *
  * This program is free software; you can redistribute it and/or modify