apache solr support

[mjhea0]

I'm working on a daemonset for connecting to Apache Solr via https://github.com/mosuka/fluent-plugin-output-solr. if I get this working, do you want me to add it to this repo?

[repeatedly]

do you want me to add it to this repo?

Currently, we don't add new maintainer for each destination.
For images, if some users want solr destination on the production, we can add it to our images like #179

[ghost]

#247