`-lit-dir=` not used for the `mainnet` subfolder for everything

[AndySchroder]

-lit-dir= not used for the mainnet subfolder for everything

Expected behavior

-lit-dir= used for everything

Actual behavior

~/.lit/mainnet/ was used

To reproduce

1. Run with -lit-dir=/home/user/.lit2/
2. No lit.macaroon and accounts.db files exist in /home/user/.lit2/mainnet/ . Those files in /home/user/.lit/mainnet/ get overwritten.

System information

Standalone install on ubuntu

Remote lnd

v0.10.1-alpha, self compiled

[ellemouton]

Thanks for catching! Fixed in #598