Improve coin configuration

[marko-lorentz]

The main `README.md that describes how to configure the LBRY coin didn't work for me. As the coin was not available in the initial coin list, I had to create it. I addition to the instructions given, you have to set the correct RPC port (14390) and switch the settings for

• Has getinfo to "false" as lbrycrd-cli does no longer support this command and
• Use segwit to "true" as is is required now (seeing Stratum errors like lbry dead lock, exiting... might indicate you missed this one).

I propose to edit the README and I will check whether it makes sense to create the coin using an SQL script that does it during the initial setup phase of the MySQL database.

[Coolguy3289]

I have to confirm whether I committed this to the repo or not, but I know that with LBC, the RPC calls being made don't properly include the segwit rules despite being set in the web panel.

[Coolguy3289]

Okay, I did: https://github.com/LBRYFoundation/pool/commit/f4276ad835433cfc2819d60b1c9e42c9dcd5cc89

[Coolguy3289]

getinfo is now supported again with lbcd. The feature is slated for removal, but at the moment it returns more accurate data than the work around yiimp implements if getinfo isn't supported.