As we add more paramters to the liqudity manager, it will become more
difficult to include them in a single cli endpoint with rules. This
commit renames the existing setparam command (which is only used for
rules at present), so that we can have a dedicated paramters cli
command for all the new values we are adding.

As we only use the readMacaroon function inside getClientConn where we
have an error return value anyway, we might as well pass the error along
correctly instead of failing hard directly.

Add the ability to get and set our liquidity paramters to the cli. A
separate rule command is added to keep the cli simple.

To provide more information about swaps, we add a failure reason field
to our swaps. We do not extend our existing state enum to remain
backwards compatible.

Expose the new channel set restriction on the loopd client rpc.

Create a HtlcConfTarget which is used as a default for quote
and loop in. Update loop out quote to use the existing var
rather than just 6 inline.

Increase rate maximum multiplier to increase maximum fees when there is a large fee rate change

With the restriction in place, it is not possible to use the
--conf_target and --fast flag at the same time. To avoid similar
problems in the future, the check for the number of amounts is
removed completely.

Allows to use external listener, such as in-memory.

This allows loopd to be used as a library by importing it and calling
Start.

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 now delay the swap by up to 30 minutes by deafult. To keep the
current imemdiate swap, --fast flag is added.

cmd/loopd swapclient_server: use SwapPublicationDeadline from LoopOutRequest