Proto commits in iegomez/mosquitto-go-auth

These 2 commits are when the Protocol Buffers files have changed:

2020-02-22

Commit:	0e39a99
Author:	Ignacio Gómez	2020-02-21 23:27:51 -0300

Finish getuser clientid support.

The documentation is generated from this commit.

Commit:	97c35e8
Author:	Ignacio Gómez	2019-06-13 17:55:21 -0400

Add gRPC backend.