code: public LetsEncryptCertificateEntity issue(final String domains)
  	{
  		// First, prove that we own the domains
  		for (String domain : domains.split(","))
  			proveOwnership(domain);
  
  		// Next, (re)generate certificates
  		return generateOrRenewCertificate(domains);
  	}
docs: Issue a certificate for a domain (or a set of domains)
  
  @param domains
  
  @return