Add support for readers and writers

[markhughes]

This plugin doesn't support adding a reader and writer endpoint for a replica.

Could a reader host be added for all the gets, and a writer host be added for all the sets?

[danielbachhuber]

Could a reader host be added for all the gets, and a writer host be added for all the sets?

We can consider it as an enhancement! I've flagged it as such.

If you'd like to prepare a pull request for this, please note that it will need to have unit tests covering the behavior too.