feat: complete IM P0 and P1 reliability work

server/http.go

@@ -28,13 +28,13 @@ import (
 	"github.com/tinode/chat/server/store/types"
 )
 
-func listenAndServe(addr string, mux *http.ServeMux, tlfConf *tls.Config, stop <-chan bool) error {
+func listenAndServe(addr string, handler http.Handler, tlfConf *tls.Config, stop <-chan bool) error {
 	globals.shuttingDown = false
 
 	httpdone := make(chan bool)
 
 	server := &http.Server{
-		Handler:           mux,
+		Handler:           handler,
 		ReadHeaderTimeout: 10 * time.Second,
 		IdleTimeout:       30 * time.Second,
 		WriteTimeout:      90 * time.Second,