Don't force LC on node set

This makes it so we can never UNDEF/DELETE an entry as that requires
upper case. So we are doing the lower case now where it matters.

internal/app/wwctl/node/set/main.go

@@ -248,7 +248,7 @@ func CobraRunE(cmd *cobra.Command, args []string) error {
 			}
 
 			wwlog.Printf(wwlog.VERBOSE, "Node: %s:%s, Setting HW address to: %s\n", n.Id.Get(), SetNetName, SetHwaddr)
-			n.NetDevs[SetNetName].Hwaddr.Set(strings.ToLower(SetHwaddr))
+			n.NetDevs[SetNetName].Hwaddr.Set(SetHwaddr)
 		}
 
 		if SetType != "" {

internal/pkg/warewulfd/nodedb.go

@@ -1,6 +1,7 @@
 package warewulfd
 
 import (
+	"strings"
 	"sync"
 
 	"github.com/pkg/errors"
@@ -32,7 +33,8 @@ func LoadNodeDB() error {
 
 	for _, n := range nodes {
 		for _, netdev := range n.NetDevs {
-			TmpMap[netdev.Hwaddr.Get()] = n
+			hwaddr := strings.ToLower(netdev.Hwaddr.Get())
+			TmpMap[hwaddr] = n
 		}
 	}