Fix broken whitelists

mtglib/init.go

@@ -176,6 +176,12 @@ type IPBlocklist interface {
 	// Contains checks if given IP address belongs to this blocklist If.
 	// it is, a connection is terminated                               .
 	Contains(net.IP) bool
+
+	// Run starts a background update procedure for a blocklist
+	Run(time.Duration)
+
+	// Shutdown stops a blocklist. It is assumed that none will access it after.
+	Shutdown()
 }
 
 // Event is a data structure which is populated during mtg request

mtglib/proxy.go

@@ -144,6 +144,12 @@ func (p *Proxy) Shutdown() {
 	p.ctxCancel()
 	p.streamWaitGroup.Wait()
 	p.workerPool.Release()
+
+	if p.whitelist != nil {
+		p.whitelist.Shutdown()
+	}
+
+	p.blocklist.Shutdown()
 }
 
 func (p *Proxy) doFakeTLSHandshake(ctx *streamContext) bool {