Fix dead URLs to ftp.kernel.org

URLs to ftp.kernel.org are still exist though the service is closed [0].
This commit fixes the URLs 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>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

MAINTAINERS

@@ -10074,7 +10074,7 @@ W:	http://sourceforge.net/projects/accel-pptp
 PREEMPTIBLE KERNEL
 M:	Robert Love <rml@tech9.net>
 L:	kpreempt-tech@lists.sourceforge.net
-W:	ftp://ftp.kernel.org/pub/linux/kernel/people/rml/preempt-kernel
+W:	https://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel
 S:	Supported
 F:	Documentation/preempt-locking.txt
 F:	include/linux/preempt.h

drivers/block/Kconfig

@@ -219,7 +219,7 @@ config BLK_DEV_LOOP
 
 	  To use the loop device, you need the losetup utility, found in the
 	  util-linux package, see
-	  <ftp://ftp.kernel.org/pub/linux/utils/util-linux/>.
+	  <https://www.kernel.org/pub/linux/utils/util-linux/>.
 
 	  The loop device driver can also be used to "hide" a file system in
 	  a disk partition, floppy, or regular file, either using encryption

drivers/md/Kconfig

@@ -115,7 +115,7 @@ config MD_RAID10
 
 	  RAID-10 requires mdadm-1.7.0 or later, available at:
 
-	  ftp://ftp.kernel.org/pub/linux/utils/raid/mdadm/
+	  https://www.kernel.org/pub/linux/utils/raid/mdadm/
 
 	  If unsure, say Y.
 

fs/autofs4/Kconfig

@@ -7,7 +7,7 @@ config AUTOFS4_FS
 	  automounter (amd), which is a pure user space daemon.
 
 	  To use the automounter you need the user-space tools from
-	  <ftp://ftp.kernel.org/pub/linux/daemons/autofs/v4/>; you also
+	  <https://www.kernel.org/pub/linux/daemons/autofs/v4/>; you also
 	  want to answer Y to "NFS file system support", below.
 
 	  To compile this support as a module, choose M here: the module will be

scripts/ksymoops/README

 ksymoops has been removed from the kernel.  It was always meant to be a
 free standing utility, not linked to any particular kernel version.
 The latest version can be found in
-ftp://ftp.<country>.kernel.org/pub/linux/utils/kernel/ksymoops together
-with patches to other utilities in order to give more accurate Oops
-debugging.
+https://www.kernel.org/pub/linux/utils/kernel/ksymoops together with patches to
+other utilities in order to give more accurate Oops debugging.
 
 Keith Owens <kaos@ocs.com.au> Sat Jun 19 10:30:34 EST 1999

scripts/package/builddeb

@@ -262,8 +262,8 @@ EOF
 cat <<EOF > debian/copyright
 This is a packacked upstream version of the Linux kernel.
 
-The sources may be found at most Linux ftp sites, including:
-ftp://ftp.kernel.org/pub/linux/kernel
+The sources may be found at most Linux archive sites, including:
+https://www.kernel.org/pub/linux/kernel
 
 Copyright: 1991 - 2015 Linus Torvalds and others.