Letsencrypt request failed without log if existing LE account

Hi,

If an account key has been already created by the official letsencrypt client in /etc/letsencrypt/accounts, virtualmin refuse to create it without any error. To reproduce, create the folder mkdir -p /etc/letsencrypt/accounts and go to a virtual-server > Manage SSL Certficate > Let'sEncrypt tab then try to generated. The output is only "Request failed:".

The problem come from webmin/letsencrypt-lib.pl , in this code (around line 107) :

        # But first check if the native Let's Encrypt client was used previously
        # for this system - if so, it must be used in future due to the account
        # key.
        -d "/etc/letsencrypt/accounts" &&
               return (0, &text('letsencrypt_enative', '/etc/letsencrypt'));

ACME does not required to use only one account key by server. This check should not exists, so all this code should be removed.

Thanks