Replica connection about fluent-plugin-mongo

[repeatedly]

It's clear from the source that nodes param was replaced by replica_set parameter and relies on host and port params inherited from out_mongo but it is not clear from the documentation.

Ah, README is outdated.
We migrated old ruby driver into new one recently and we forgot to update its parameters.

a host/port values if I have more than 1 replica member

One idea is re-add nodes parameter to out_mongo_replset.

[megamk]

One idea is re-add nodes parameter to out_mongo_replset.

Another good alternative is to add a connection_string parameter so that connection type will be set up just with one parameter, since connection string supports both single host and replica with any number of nodes

[megamk]

@repeatedly I have some changes in my fork, do I need to make tests or you accept PRs without tests?
megamk@a8971d6

[repeatedly]

you accept PRs without tests?

This is hard because we can't guarantee your change breaks existing behaviour.
Please add test and send a PR.
Your patch is tested on travis-ci with actual mongodb.

[repeatedly]

Release v0.8.1 with connection_string. Thanks for the idea!