New Feature: ACME Certificate Application Supports Domain-Alias Mode

[ramonde]

ACME certificate issuance now supports the --domain-alias mode, see
https://github.com/acmesh-official/acme.sh/wiki/DNS-alias-mode#7-challenge-alias-or-domain-alias

1. Specify to use the --domain-alias mode

2. Fill in the verification alias domain name

3. Submit the SSL certificate application