initialization

var CRL *pkix.CertificateList

var CertPool *x509.CertPool

CertPool only contains our CA

var Singleton *sc.Configure

Singleton wormhole server configures

var TLSCertificate tls.Certificate

TLSCertificate server tls certificate

var VersionString = "[SELF BUILD]"

VersionString wormhole-server version string, will be replace when build release version