Version 0.64 is available upstream. Please consider updating! It seems that version 0.64 is available upstream, while the latest version in the Gentoo tree is 0.63. You think this warning is false? Read more about it here.
The ngx-echo module wraps lots of NGINX internal APIs for streaming input and output,
parallel/sequential subrequests, timers and sleeping, as well as various metadata
accessing.
Basically it provides various utilities that help testing and debugging of other modules by
trivially emulating different kinds of faked subrequest locations.