Drop all the kernel checks and let the user deal with having a new enough
version of the kernel to enjoy this.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
---

diff -Nura ipset-6.8.orig//Makefile.am ipset-6.8/Makefile.am
--- ipset-6.8.orig//Makefile.am	2011-08-17 16:10:41.999386034 -0300
+++ ipset-6.8/Makefile.am	2011-08-17 16:17:34.108702969 -0300
@@ -4,11 +4,6 @@
 
 include $(top_srcdir)/Make_global.am
 
-if ! WITH_KBUILDDIR
-KBUILD_OUTPUT=/lib/modules/`uname -r`/build
-else
-KBUILD_OUTPUT=$(KBUILDDIR)
-endif
 if ! WITH_MAXSETS
 IP_SET_MAX=256
 else
@@ -22,23 +17,6 @@
 
 SUBDIRS		= lib src
 
-modules_sparse:
-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
-			V=$V C=2 CF=-D__CHECK_ENDIAN__ \
-			IP_SET_MAX=$(IP_SET_MAX) KDIR=$$PWD/kernel modules
-
-modules:
-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter V=$V \
-			IP_SET_MAX=$(IP_SET_MAX) KDIR=$$PWD/kernel modules
-
-modules_install:
-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
-			KDIR=$$PWD/kernel modules_install
-
-modules_clean:
-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
-			KDIR=$$PWD/kernel clean
-
 update_includes:
 	./update ip_set.h
 	./update ip_set_bitmap.h
diff -Nura ipset-6.8.orig//configure.ac ipset-6.8/configure.ac
--- ipset-6.8.orig//configure.ac	2011-08-17 16:10:42.015387986 -0300
+++ ipset-6.8/configure.ac	2011-08-17 16:18:01.578056869 -0300
@@ -11,51 +11,6 @@
 *) AC_MSG_ERROR([Linux systems supported exclusively!]);;
 esac
 
-dnl Additional arguments
-dnl Kernel build directory or source tree
-AC_ARG_WITH([kbuild],
-            AS_HELP_STRING([--with-kbuild=PATH],
-                           [Path to kernel build directory]),
-            [KBUILDDIR="$withval";])
-AC_ARG_WITH([ksource],
-            AS_HELP_STRING([--with-ksource=PATH],
-                           [Path to kernel source directory, if not the same as the kernel build directory]),
-            [KSOURCEDIR="$withval";])
-AM_CONDITIONAL(WITH_KBUILDDIR, test "$KBUILDDIR" != "")
-AC_SUBST(KBUILDDIR)
-
-dnl Sigh: check kernel version dependencies
-if test "$KBUILDDIR" != ""
-then
-	kbuilddir="$KBUILDDIR"
-else
-	kbuilddir="/lib/modules/`uname -r`/build"
-fi
-
-if test -n "$KSOURCEDIR"; then
-	ksourcedir="$KSOURCEDIR"
-elif test -e "$kbuilddir/include/linux/netfilter/nfnetlink.h"; then
-	ksourcedir="$kbuilddir"
-else
-	ksourcedir="/lib/modules/$(uname -r)/source"
-fi
-if test ! -e "$ksourcedir/include/linux/netfilter/nfnetlink.h"
-then
-	AC_MSG_ERROR([Invalid kernel source directory $ksourcedir])
-fi
-
-if test ! -e "$kbuilddir/.config"
-then
-	AC_MSG_ERROR([The kernel build directory $kbuilddir is not configured])
-fi
-
-AC_PROG_GREP
-
-if test "X`$GREP 'NFNL_SUBSYS_IPSET' $ksourcedir/include/linux/netfilter/nfnetlink.h`" = "X"
-then
-	AC_MSG_ERROR([The kernel source directory $ksourcedir is not patched with netlink.patch to support ipset])
-fi
-
 dnl Maximal number of sets supported by the kernel, default 256
 AC_ARG_WITH([maxsets],
 	    AS_HELP_STRING([--with-maxsets=256],