We need the ability to connect to a swap server that uses
a self-signed certificate. The LSAT proxy cannot proxy insecure
gRPC requests since they don't conform to the HTTP 1.1 standard.
Therefore the LSAT proxy fill only serve TLS connections.
This means, we need the TLS path option to specify the certificate
the test environment LSAT proxy uses.
We update to new set of server protos where new Terms calls are added.
Here static information will be returned from the server.
We no longer have a feebase+feerate, but get a final fee directly
returned by the server.
