- Provides clarity to the sample `lnd.conf` to reduce friction on a first-time mainnet set up of lnd (avoiding the `loadConfig: debug-htlc mode cannot be used on bitcoin mainnet` error)
- Removes `debughtlc` from the sample `lnd.conf` since it is not something most people would use anymore
- Adds link to `sample-lnd.conf` with proper line-wrapping
