Support for IP in subjectAltName

[Spindel]

For kubernetes we need to support IP's as subjectAltName.

Envisioned usage for this is that tagging of extras in SAN will be done on the server/tooling site.

Suggested usage
caramel_tool --add-san IP 10.10.0.1 $ID

Perhaps a --list-san and --clear-san needed too.

Implementation:

• new table with: id | csr.id (fk not null) | option ENUM ("IP" ,"DNS") | string value (not null)

And rather than adding SAN DNS in the sign method, we add it on the request received/inserted, and populate it further.

[Spindel]

This is needed for Kubernetes integration / support