hst/fsbind: optional autoetc behaviour

This generalises the special field allowing any special behaviour to be matched from target.

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

internal/app/seal_linux.go

@@ -246,10 +246,10 @@ func (seal *outcome) finalise(ctx context.Context, sys sys.State, config *hst.Co
 
 			Filesystem: []hst.FilesystemConfigJSON{
 				{&hst.FSBind{
-					Target:   container.AbsFHSRoot,
-					Source:   container.AbsFHSRoot,
-					Write:    true,
-					AutoRoot: true,
+					Target:  container.AbsFHSRoot,
+					Source:  container.AbsFHSRoot,
+					Write:   true,
+					Special: true,
 				}},
 			},
 		}