When MC is running on a processor with a control subnet and a user
attempts to access the UI via the control subnet, the return _config.local.json
needs to reflect the CS LAN IP address for the processor rather than the LAN IP Address.
In order to accomplish this, there will now be 2 config files written to disk on startup:
1. the original file, /user/programX/mcUserApp/_local-config/_config.local.json
2. A file with the correct CS IP Address /user/programX/mcUserApp/_local-config/_config.cs.json
When a user requests the _config.local.json, the processor will compare the remote IP address
with the CS LAN IP Address and determine if they're in the same subnet, the assumption being
that if the IP Addresses are in the same subnet, then the app or end user is on the CS LAN and needs the CS config.
If the addresses are in the same subnet, then the contents of the _config.cs.json will be returned.
