fix #6907: memory: allow multi-digit host nodes with hugepages

When hugepages are enabled, each custom NUMA node must be bound to a
single host node. This was checked with a regex that only accepts a
single digit, so any host node from 10 upwards was rejected with a
misleading "more than 1 hostnode value" error, making hugepages
unusable on hosts with more than ten NUMA nodes.

Accept any single node number instead. Ranges and lists are still
rejected as before.

Signed-off-by: Michal Fox <me@dualfroz.com>

src/PVE/QemuServer/Memory.pm

@@ -640,7 +640,7 @@ sub hugepages_topology {
         my $hostnodes = print_numa_hostnodes($hostnodelists);
 
         die "more than 1 hostnode value in numa node is not supported when hugepages are enabled"
-            if $hostnodes !~ m/^(\d)$/;
+            if $hostnodes !~ m/^\d+$/;
         my $hugepages_size = hugepages_size($conf, $numa_memory);
         $hugepages_topology->{$hugepages_size}->{$hostnodes} +=
             hugepages_nr($numa_memory, $hugepages_size);