Replace HTTP links with HTTPS ones: OMFS

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 <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/20200708062842.12214-1-grandmaster@al2klimov.deSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/filesystems/omfs.rst

@@ -24,7 +24,7 @@ More information is available at:
 Various utilities, including mkomfs and omfsck, are included with
 omfsprogs, available at:
 
-    http://bobcopeland.com/karma/
+    https://bobcopeland.com/karma/
 
 Instructions are included in its README.