Implement export to remote syslog server (implement #4419)

scripts/plugins/endpoints/syslog_alert_endpoint/locales/en.lua

@@ -0,0 +1,17 @@
+--
+-- (C) 2020 - ntop.org
+--
+
+return {
+   alert_format = "Format",
+   content = "Content",
+   description = "Host, Port and Protocol should be specified for remote syslog servers only.",
+   host = "Host",
+   port = "Port",
+   protocol = "Protocol",
+   text = "Text",
+   validation = {
+      invalid_host = "Invalid Syslog host.",
+      invalid_port = "Invalid Syslog port.",
+   },
+}