Requirement of a C Stub

[thekief]

The readme talks about being loosely based on the nginxinc/ngx-rust project. The readme of ǹgx-rust` mentions that the setup requires a C stub for a proper setup but suggest that future versions will not need this stub.

In this project there is no information regarding the necessity of adding a stub. In addition the project nginxinc/ngx-istio-mixer mentioned in #4 adds to the confusion, as the authors of ngx-istio-mixer use the ''old setup'' based on their ngx-rust repository. Could you clarify if there is any necessity for a C stub, does it suffice to build a cdylib, etc.?

[thekief]

@yaa110 could you give some input on this?

[yaa110]

@thekief I am not working on this project anymore. Maybe it's contributes can help on this.