Requests may fail if host setting ends in trailing slash

[Matthew Boynes]

Setting the host as http://localhost:9200/ vs http://localhost:9200 might cause the plugin to not work. This should be sanitized using untrailingslashit() if that's the case.

[Daniel Bachhuber]

I ran into this. The specific error was "No handler found for uri"

[Matthew Boynes]

Thanks!