drm/vboxvideo: 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: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200713124923.34282-1-grandmaster@al2klimov.de

drivers/gpu/drm/vboxvideo/hgsmi_defs.h

@@ -58,7 +58,7 @@ struct hgsmi_buffer_tail {
 	/* Reserved, must be initialized to 0. */
 	u32 reserved;
 	/*
-	 * One-at-a-Time Hash: http://www.burtleburtle.net/bob/hash/doobs.html
+	 * One-at-a-Time Hash: https://www.burtleburtle.net/bob/hash/doobs.html
 	 * Over the header, offset and for first 4 bytes of the tail.
 	 */
 	u32 checksum;

drivers/gpu/drm/vboxvideo/vbox_hgsmi.c

@@ -8,7 +8,7 @@
 #include "vboxvideo_vbe.h"
 #include "hgsmi_defs.h"
 
-/* One-at-a-Time Hash from http://www.burtleburtle.net/bob/hash/doobs.html */
+/* One-at-a-Time Hash from https://www.burtleburtle.net/bob/hash/doobs.html */
 static u32 hgsmi_hash_process(u32 hash, const u8 *data, int size)
 {
 	while (size--) {