Documentation: Fix dead URLs to ftp.kernel.org

As ftp.kernel.org is closed [0], this commit fixes dead URLs in
documents to use www.kernel.org instead.

[0] https://www.kernel.org/shutting-down-ftp-services.html

Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Acked-by: Theodore Ts'o <tytso@mit.edu>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/early-userspace/README

@@ -86,7 +86,7 @@ early userspace useful.  The klibc distribution is currently
 maintained separately from the kernel.
 
 You can obtain somewhat infrequent snapshots of klibc from
-ftp://ftp.kernel.org/pub/linux/libs/klibc/
+https://www.kernel.org/pub/linux/libs/klibc/
 
 For active users, you are better off using the klibc git
 repository, at http://git.kernel.org/?p=libs/klibc/klibc.git

Documentation/filesystems/ext4.txt

@@ -25,7 +25,7 @@ Note: More extensive information for getting started with ext4 can be
 	
 	or
 
-    ftp://ftp.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/
+    https://www.kernel.org/pub/linux/kernel/people/tytso/e2fsprogs/
 
 	or grab the latest git repository from:
 

Documentation/filesystems/nfs/nfs-rdma.txt

@@ -110,10 +110,10 @@ Installation
   - Install a Linux kernel with NFS/RDMA
 
     The NFS/RDMA client and server are both included in the mainline Linux
-    kernel version 2.6.25 and later. This and other versions of the 2.6 Linux
+    kernel version 2.6.25 and later. This and other versions of the Linux
     kernel can be found at:
 
-    ftp://ftp.kernel.org/pub/linux/kernel/v2.6/
+    https://www.kernel.org/pub/linux/kernel/
 
     Download the sources and place them in an appropriate location.
 

Documentation/networking/e100.txt

@@ -130,7 +130,7 @@ Additional Configurations
   version 1.6 or later is required for this functionality.
 
   The latest release of ethtool can be found from
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
   Enabling Wake on LAN* (WoL)
   ---------------------------

Documentation/networking/e1000.txt

@@ -435,7 +435,7 @@ Additional Configurations
   version 1.6 or later is required for this functionality.
 
   The latest release of ethtool can be found from
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
   Enabling Wake on LAN* (WoL)
   ---------------------------

Documentation/networking/e1000e.txt

@@ -274,7 +274,7 @@ Additional Configurations
   diagnostics, as well as displaying statistical information.  We
   strongly recommend downloading the latest version of ethtool at:
 
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://kernel.org/pub/software/network/ethtool/
 
   NOTE: When validating enable/disable tests on some parts (82578, for example)
   you need to add a few seconds between tests when working with ethtool.

Documentation/networking/igb.txt

@@ -63,7 +63,7 @@ Additional Configurations
   diagnostics, as well as displaying statistical information. The latest
   version of ethtool can be found at:
 
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
   Enabling Wake on LAN* (WoL)
   ---------------------------

Documentation/networking/igbvf.txt

@@ -62,7 +62,7 @@ Additional Configurations
   version 3.0 or later is required for this functionality, although we
   strongly recommend downloading the latest version at:
 
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
 Support
 =======

Documentation/networking/ixgb.txt

@@ -313,7 +313,7 @@ Additional Configurations
   version 1.6 or later is required for this functionality.
 
   The latest release of ethtool can be found from
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
   NOTE: The ethtool version 1.6 only supports a limited set of ethtool options.
         Support for a more complete ethtool feature set can be enabled by

Documentation/networking/ixgbe.txt

@@ -272,7 +272,7 @@ Additional Configurations
   ethtool version is required for this functionality.
 
   The latest release of ethtool can be found from
-  http://ftp.kernel.org/pub/software/network/ethtool/
+  https://www.kernel.org/pub/software/network/ethtool/
 
   FCoE
   ----

Documentation/process/applying-patches.rst

@@ -250,17 +250,11 @@ specific homes.
 
 The 4.x.y (-stable) and 4.x patches live at
 
-	ftp://ftp.kernel.org/pub/linux/kernel/v4.x/
+	https://www.kernel.org/pub/linux/kernel/v4.x/
 
 The -rc patches live at
 
-	ftp://ftp.kernel.org/pub/linux/kernel/v4.x/testing/
-
-In place of ``ftp.kernel.org`` you can use ``ftp.cc.kernel.org``, where cc is a
-country code. This way you'll be downloading from a mirror site that's most
-likely geographically closer to you, resulting in faster downloads for you,
-less bandwidth used globally and less load on the main kernel.org servers --
-these are good things, so do use mirrors when possible.
+	https://www.kernel.org/pub/linux/kernel/v4.x/testing/
 
 
 The 4.x kernels
@@ -317,7 +311,7 @@ the current stable kernel.
  The -stable team usually do make incremental patches available as well
  as patches against the latest mainline release, but I only cover the
  non-incremental ones below. The incremental ones can be found at
- ftp://ftp.kernel.org/pub/linux/kernel/v4.x/incr/
+ https://www.kernel.org/pub/linux/kernel/v4.x/incr/
 
 These patches are not incremental, meaning that for example the 4.7.3
 patch does not apply on top of the 4.7.2 kernel source, but rather on top

Documentation/process/changes.rst

@@ -349,7 +349,7 @@ Make
 Binutils
 --------
 
-- <ftp://ftp.kernel.org/pub/linux/devel/binutils/>
+- <https://www.kernel.org/pub/linux/devel/binutils/>
 
 OpenSSL
 -------
@@ -362,17 +362,17 @@ System utilities
 Util-linux
 ----------
 
-- <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>
+- <https://www.kernel.org/pub/linux/utils/util-linux/>
 
 Ksymoops
 --------
 
-- <ftp://ftp.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
+- <https://www.kernel.org/pub/linux/utils/kernel/ksymoops/v2.4/>
 
 Module-Init-Tools
 -----------------
 
-- <ftp://ftp.kernel.org/pub/linux/kernel/people/rusty/modules/>
+- <https://www.kernel.org/pub/linux/utils/kernel/module-init-tools/>
 
 Mkinitrd
 --------
@@ -402,7 +402,7 @@ Xfsprogs
 Pcmciautils
 -----------
 
-- <ftp://ftp.kernel.org/pub/linux/utils/kernel/pcmcia/>
+- <https://www.kernel.org/pub/linux/utils/kernel/pcmcia/>
 
 Quota-tools
 -----------