Add service script and make timout optional for EventConsumer ctor (#1775)

* Change. Pass pid file first. Because there really no need pass timeout.
Add. `fsc` script to be able shutdown MWI and Call Flow subscribe services.

* Change. rename `fsc` to `service`.

* Change. Use `stop` command instead of `shutdown`

resources/install/scripts/service

@@ -0,0 +1,14 @@
+-- File to conrol FusionPBX Lua services/monitors
+-- @usage: 
+--  # stop `call_flow_subscribe` monitor
+--  fs_cli -x "lua service flow stop"
+--  # stop `mwi_subscribe` monitor
+--  fs_cli -x "lua service mwi stop"
+
+local destination = assert(argv[1], "No service name")
+local command     = assert(argv[2], "No command")
+
+local event = freeswitch.Event("CUSTOM", "fusion::service::"  .. destination);
+event:addHeader('service-command', command)
+
+event:fire()