hst: rename net and abstract fields

This makes more sense and matches the container library.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/app/seal_linux.go

@@ -238,11 +238,11 @@ func (seal *outcome) finalise(ctx context.Context, sys sys.State, config *hst.Co
 		}
 
 		conf := &hst.ContainerConfig{
-			Userns:   true,
-			Net:      true,
-			Abstract: true,
-			Tty:      true,
-			AutoEtc:  true,
+			Userns:       true,
+			HostNet:      true,
+			HostAbstract: true,
+			Tty:          true,
+			AutoEtc:      true,
 
 			AutoRoot:  container.AbsFHSRoot,
 			RootFlags: container.BindWritable,