quadlet: Support multiple Network=

This is supported by podman run with --network, so makes sense.

Signed-off-by: Alexander Larsson <alexl@redhat.com>

docs/source/markdown/podman-systemd.unit.5.md

@@ -240,6 +240,8 @@ Specify a custom network for the container. This has the same format as the `--n
 to `podman run`. For example, use `host` to use the host network in the container, or `none` to
 not set up networking in the container.
 
+This key can be listed multiple times.
+
 #### `ExposeHostPort=`
 
 Exposes a port, or a range of ports (e.g. `50-59`), from the host to the container. Equivalent

pkg/systemd/quadlet/quadlet.go

@@ -373,10 +373,12 @@ func ConvertContainer(container *parser.UnitFile, isUser bool) (*parser.UnitFile
 		podman.addf("--tz=%s", timezone)
 	}
 
-	network, ok := container.Lookup(ContainerGroup, KeyNetwork)
-	if ok && len(network) > 0 {
+	networks := container.LookupAll(ContainerGroup, KeyNetwork)
+	for _, network := range networks {
+		if len(network) > 0 {
 			podman.addf("--network=%s", network)
 		}
+	}
 
 	// Run with a pid1 init to reap zombies by default (as most apps don't do that)
 	runInit := container.LookupBoolean(ContainerGroup, KeyRunInit, true)