Maint: loopstate package used in Openvpn state

internal/loopstate/lock.go

@@ -0,0 +1,9 @@
+package loopstate
+
+type Locker interface {
+	Lock()
+	Unlock()
+}
+
+func (s *State) Lock()   { s.loopMu.Lock() }
+func (s *State) Unlock() { s.loopMu.Unlock() }