some changes

internal/server/registry.go

@@ -0,0 +1,27 @@
+package server
+
+import (
+	"sync"
+)
+
+type registry struct {
+	lss map[string]*LiveServer
+	mu  sync.Mutex
+}
+
+var reg = registry{
+	lss: make(map[string]*LiveServer),
+}
+
+func pushLs(ls *LiveServer) {
+	reg.lss[ls.name] = ls
+}
+
+func isExists(name string) bool {
+	_, ok := reg.lss[name]
+	return ok
+}
+
+func deleteLs(name string) {
+	delete(reg.lss, name)
+}