Return OnBoot to wwtype.WWbool

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

overlays/debian.interfaces/internal/debian_interfaces_test.go

@@ -53,7 +53,6 @@ const debian_interfaces string = `backupFile: true
 writeFile: true
 Filename: default
 # This file is autogenerated by warewulf
-auto wwnet0
 allow-hotplug wwnet0
 iface wwnet0 inet static
   address 192.168.3.21
@@ -64,7 +63,6 @@ backupFile: true
 writeFile: true
 Filename: secondary
 # This file is autogenerated by warewulf
-auto wwnet1
 allow-hotplug wwnet1
 iface wwnet1 inet static
   address 192.168.3.22

overlays/debian.interfaces/rootfs/etc/network/interfaces.d/default.ww

@@ -1,7 +1,7 @@
 {{- range $devname, $netdev := .ThisNode.NetDevs }}
 {{- file $devname }}
 # This file is autogenerated by warewulf
-{{- if or $netdev.OnBoot (eq $netdev.OnBoot nil) }}
+{{- if $netdev.OnBoot }}
 auto {{ $netdev.Device }}
 {{- end }}
 allow-hotplug {{ $netdev.Device }}