[mgmt] release: 0.0.21 (with new distro packages!)

[James]

On Fri, Oct 4, 2019 at 8:54 AM Jimmy Tang <jcftang at gmail.com> wrote:
> Centos7 and maybe Centos8 builds would be nice.

Yeah, good point. I don't know why my brain forgot about CentOS. Want
to send the patch? It's pretty trivial copy-paste stuff.
Looks almost like this:
https://github.com/purpleidea/mgmt/commit/ffe402f201fb15533baffd69108bceea1cc75c8a
modulo the slight changes that have been made in git master after
this.

LMK,
James