Add support for http01_address renewal parameter

[tomc603]

What type of request is this?

Enhancement to existing add-on

Existing add-on name

Let's Encrypt

Describe the add-on or add-on enhancement

When configuring renewal using the HTTP endpoint, it is useful to allow the http01_address parameter for hosts with multiple DNS entries. If an administrator isn't using split horizon, or if firewall and routing rules make one address preferable over others offered as answers to DNS queries, then certbot will often attempt to connect to those addresses. Allowing the selection of a renewal address corrects these issues.

Use cases

Short-cutting the address selection when renewing certificates using the http method

Upstream project

No response

Anything else?

The http01_address parameter is stored in the renewal/<FQDN>.conf file under [renewalparams].