Contribs: update NFS to 5.0.1

(cherry picked from commit 50baf567)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/nfs/SHA512SUMS

-3d93d83d1909f24de304c0d47fa6240da7ecf43ce2488a242a58ddabe51d774caf813f5a90ae720a8edd251a765b30e88c0e5b6a13ecb254dfecdc98e30737fa  libnfs-4.0.0.tar.gz
+71f2dcfa8945c1cb6402f5fca10b1f7a4720f7589807d6130eb55361f05ef4684f9cc9a177ece4e13d3847ac6606924115fac7b27749cecc2f5aca6fa9c63ebf  libnfs-5.0.1.tar.gz

contrib/src/nfs/mingw-snprintf.patch

---- nfs/include/win32/win32_compat.h.orig	2021-03-15 10:40:08.534061716 +0200
-+++ nfs/include/win32/win32_compat.h	2021-03-15 10:40:54.088974157 +0200
-@@ -133,7 +133,7 @@
- 
- /* Wrapper macros to call misc. functions win32 is missing */
- #define poll(x, y, z)        win32_poll(x, y, z)
--#define snprintf             sprintf_s
-+//#define snprintf             sprintf_s
- #define inet_pton(x,y,z)     win32_inet_pton(x,y,z)
- #define open(x, y, z)        _open(x, y, z)
- #ifndef lseek

contrib/src/nfs/rules.mak

 # NFS
-NFS_VERSION := 4.0.0
+NFS_VERSION := 5.0.1
 NFS_URL := https://github.com/sahlberg/libnfs/archive/libnfs-$(NFS_VERSION).tar.gz
 
 PKGS += nfs
@@ -15,7 +15,6 @@ $(TARBALLS)/libnfs-$(NFS_VERSION).tar.gz:
 nfs: libnfs-$(NFS_VERSION).tar.gz .sum-nfs
 	$(UNPACK)
 	mv libnfs-libnfs-$(NFS_VERSION) libnfs-$(NFS_VERSION)
-	$(APPLY) $(SRC)/nfs/mingw-snprintf.patch
 	$(UPDATE_AUTOCONFIG)
 	$(MOVE)