libceph: 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.

[ idryomov: Do the same for the CRUSH paper and replace
  ceph.newdream.net with ceph.io. ]
Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

fs/ceph/Kconfig

@@ -13,7 +13,7 @@ config CEPH_FS
 	  scalable file system designed to provide high performance,
 	  reliable access to petabytes of storage.
 
-	  More information at http://ceph.newdream.net/.
+	  More information at https://ceph.io/.
 
 	  If unsure, say N.
 

include/linux/crush/crush.h

@@ -17,7 +17,7 @@
  * The algorithm was originally described in detail in this paper
  * (although the algorithm has evolved somewhat since then):
  *
- *     http://www.ssrc.ucsc.edu/Papers/weil-sc06.pdf
+ *     https://www.ssrc.ucsc.edu/Papers/weil-sc06.pdf
  *
  * LGPL2
  */

net/ceph/Kconfig

@@ -13,7 +13,7 @@ config CEPH_LIB
 	  common functionality to both the Ceph filesystem and
 	  to the rados block device (rbd).
 
-	  More information at http://ceph.newdream.net/.
+	  More information at https://ceph.io/.
 
 	  If unsure, say N.
 

net/ceph/ceph_hash.c

@@ -4,7 +4,7 @@
 
 /*
  * Robert Jenkin's hash function.
- * http://burtleburtle.net/bob/hash/evahash.html
+ * https://burtleburtle.net/bob/hash/evahash.html
  * This is in the public domain.
  */
 #define mix(a, b, c)						\

net/ceph/crush/hash.c

@@ -7,7 +7,7 @@
 
 /*
  * Robert Jenkins' function for mixing 32-bit values
- * http://burtleburtle.net/bob/hash/evahash.html
+ * https://burtleburtle.net/bob/hash/evahash.html
  * a, b = random bits, c = input and output
  */
 #define crush_hashmix(a, b, c) do {			\

net/ceph/crush/mapper.c

@@ -298,7 +298,7 @@ static __u64 crush_ln(unsigned int xin)
  *
  * for reference, see:
  *
- * http://en.wikipedia.org/wiki/Exponential_distribution#Distribution_of_the_minimum_of_exponential_random_variables
+ * https://en.wikipedia.org/wiki/Exponential_distribution#Distribution_of_the_minimum_of_exponential_random_variables
  *
  */