Implement server certificate store

gemini.go

@@ -58,7 +58,7 @@ func init() {
 	}
 	DefaultClient.GetCertificate = func(hostname string, store CertificateStore) *tls.Certificate {
 		// If the certificate is in the store, return it
-		if cert, ok := store[hostname]; ok {
+		if cert, err := store.Lookup(hostname); err == nil {
 			return cert
 		}
 		// Otherwise, generate a certificate
@@ -68,7 +68,7 @@ func init() {
 			return nil
 		}
 		// Store and return the certificate
-		store[hostname] = &cert
+		store.Add(hostname, cert)
 		return &cert
 	}
 }