Replace HTTP links with HTTPS ones: DRBD driver

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 both the HTTP and HTTPS versions
return 200 OK and serve the same content:
Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/admin-guide/blockdev/drbd/index.rst

···
   clusters and in this context, is a "drop-in" replacement for shared
   storage. Simplistically, you could see it as a network RAID 1.
 
-  Please visit http://www.drbd.org to find out more.
+  Please visit https://www.drbd.org to find out more.
 
 .. toctree::
    :maxdepth: 1

Documentation/admin-guide/blockdev/floppy.rst

···
 =========
 
 A FAQ list may be found in the fdutils package (see below), and also
-at <http://fdutils.linux.lu/faq.html>.
+at <https://fdutils.linux.lu/faq.html>.
 
 
 LILO configuration options (Thinkpad users, read this)
···
 
 The latest version can be found at fdutils homepage:
 
- http://fdutils.linux.lu
+ https://fdutils.linux.lu
 
 The fdutils releases can be found at:
 
- http://fdutils.linux.lu/download.html
+ https://fdutils.linux.lu/download.html
 
  http://www.tux.org/pub/knaff/fdutils/
 

drivers/block/drbd/Kconfig

···
 	  cache coherency.
 
 	  For automatic failover you need a cluster manager (e.g. heartbeat).
-	  See also: http://www.drbd.org/, http://www.linux-ha.org
+	  See also: https://www.drbd.org/, http://www.linux-ha.org
 
 	  If unsure, say N.