[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

app/server.go

@@ -591,7 +591,7 @@ func NewServer(options ...Option) (*Server, error) {
 	mlog.Info("Printing current working", mlog.String("directory", pwd))
 	mlog.Info("Loaded config", mlog.String("source", s.configStore.String()))
 
-	s.checkPushNotificationServerUrl()
+	s.checkPushNotificationServerURL()
 
 	s.ReloadConfig()
 
@@ -1431,7 +1431,7 @@ func (a *App) OriginChecker() func(*http.Request) bool {
 	return nil
 }
 
-func (s *Server) checkPushNotificationServerUrl() {
+func (s *Server) checkPushNotificationServerURL() {
 	notificationServer := *s.Config().EmailSettings.PushNotificationServer
 	if strings.HasPrefix(notificationServer, "http://") {
 		mlog.Warn("Your push notification server is configured with HTTP. For improved security, update to HTTPS in your configuration.")
@@ -1766,7 +1766,7 @@ func (s *Server) StartSearchEngine() (string, string) {
 					mlog.Error(err.Error())
 				}
 			})
-		} else if s.SearchEngine.ElasticsearchEngine != nil && *oldConfig.ElasticsearchSettings.Password != *newConfig.ElasticsearchSettings.Password || *oldConfig.ElasticsearchSettings.Username != *newConfig.ElasticsearchSettings.Username || *oldConfig.ElasticsearchSettings.ConnectionUrl != *newConfig.ElasticsearchSettings.ConnectionUrl || *oldConfig.ElasticsearchSettings.Sniff != *newConfig.ElasticsearchSettings.Sniff {
+		} else if s.SearchEngine.ElasticsearchEngine != nil && *oldConfig.ElasticsearchSettings.Password != *newConfig.ElasticsearchSettings.Password || *oldConfig.ElasticsearchSettings.Username != *newConfig.ElasticsearchSettings.Username || *oldConfig.ElasticsearchSettings.ConnectionURL != *newConfig.ElasticsearchSettings.ConnectionURL || *oldConfig.ElasticsearchSettings.Sniff != *newConfig.ElasticsearchSettings.Sniff {
 			s.Go(func() {
 				if *oldConfig.ElasticsearchSettings.EnableIndexing {
 					if err := s.SearchEngine.ElasticsearchEngine.Stop(); err != nil {