Replace HTTP links with HTTPS ones: Documentation/filesystems

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/20200621133552.46371-1-grandmaster@al2klimov.de
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index ed17771..16ca879 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -1431,13 +1431,13 @@
  version.)
 
 Creating Linux virtual filesystems. 2002
-    <http://lwn.net/Articles/13325/>
+    <https://lwn.net/Articles/13325/>
 
 The Linux Virtual File-system Layer by Neil Brown. 1999
     <http://www.cse.unsw.edu.au/~neilb/oss/linux-commentary/vfs.html>
 
 A tour of the Linux VFS by Michael K. Johnson. 1996
-    <http://www.tldp.org/LDP/khg/HyperNews/get/fs/vfstour.html>
+    <https://www.tldp.org/LDP/khg/HyperNews/get/fs/vfstour.html>
 
 A small trail through the Linux kernel by Andries Brouwer. 2001
-    <http://www.win.tue.nl/~aeb/linux/vfs/trail.html>
+    <https://www.win.tue.nl/~aeb/linux/vfs/trail.html>