域名验证通配符证书主要有:
GeoTrust RapidSSL Wildcard
Comodo PositiveSSL Wildcard
Comodo EssentialSSL Wildcard
GlobalSign AlphaSSL Wildcard
兼容性:GeoTrust>Comodo>GlobalSign
市场占用率文章:http://w3techs.com/technologies/overview/ssl_certificate/all
基本上最高端兼容性最好的CA都在Symantec手里了