lxc-checkconfig: Fix parsing on vserver kernels

src/lxc/lxc-checkconfig.in

@@ -78,13 +78,13 @@ print_cgroups() {
 }
 
 CGROUP_MNT_PATH=`print_cgroups cgroup /proc/self/mounts | head -n 1`
-KVER_MAJOR=$($GREP '^# Linux' $CONFIG | \
+KVER_MAJOR=$($GREP '^# Linux.*Kernel Configuration' $CONFIG | \
     sed -r 's/.* ([0-9])\.[0-9]{1,2}\.[0-9]{1,3}.*/\1/')
 if [ "$KVER_MAJOR" = "2" ]; then
-KVER_MINOR=$($GREP '^# Linux' $CONFIG | \
+KVER_MINOR=$($GREP '^# Linux.*Kernel Configuration' $CONFIG | \
     sed -r 's/.* 2.6.([0-9]{2}).*/\1/')
 else
-KVER_MINOR=$($GREP '^# Linux' $CONFIG | \
+KVER_MINOR=$($GREP '^# Linux.*Kernel Configuration' $CONFIG | \
     sed -r 's/.* [0-9]\.([0-9]{1,3})\.[0-9]{1,3}.*/\1/')
 fi