log init parameters in config files

rtu/config.lua

@@ -4,6 +4,12 @@
 SERVER_PORT = 16000
 -- port to listen to incoming packets FROM server
 LISTEN_PORT = 15001
+-- log path
+LOG_PATH = "/log.txt"
+-- log mode
+--  0 = APPEND (adds to existing file on start)
+--  1 = NEW (replaces existing file on start)
+LOG_MODE = 0
 -- RTU peripheral devices (named: side/network device name)
 RTU_DEVICES = {
     {

rtu/startup.lua

@@ -26,7 +26,7 @@ local println = util.println
 local print_ts = util.print_ts
 local println_ts = util.println_ts
 
-log.init("/log.txt", log.MODE.APPEND)
+log.init(config.LOG_PATH, config.LOG_MODE)
 
 log._info("========================================")
 log._info("BOOTING rtu.startup " .. RTU_VERSION)