package/libmnl: use upstream sha256sum

ftp.netfilter.org no longer provides ftp, so use the https:// url from
_SITE.

This provides a .sha256sum but NOT md5/sha1, so update the .hash file to
match.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 5cbcbf5078b51ac15fe58a506a51639685dcd370)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libmnl/libmnl.hash

@@ -1,7 +1,5 @@
-# From ftp://ftp.netfilter.org/pub/libmnl/libmnl-1.0.5.tar.bz2.{md5sum,sha1sum}
-md5  0bbb70573119ec5d49435114583e7a49  libmnl-1.0.5.tar.bz2
-sha1  63c6456b77f7978a7b37e62c1b38346b2ef2d91c  libmnl-1.0.5.tar.bz2
+# From https://netfilter.org/projects/libmnl/files/libmnl-1.0.5.tar.bz2.sha256sum
+sha256  274b9b919ef3152bfb3da3a13c950dd60d6e2bcd54230ffeca298d03b40d0525  libmnl-1.0.5.tar.bz2
 
 # Locally calculated
-sha256  274b9b919ef3152bfb3da3a13c950dd60d6e2bcd54230ffeca298d03b40d0525  libmnl-1.0.5.tar.bz2
 sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING