Whoops, finishing up the last commit properly

Need to add the name to namesObtaining each time we use the ACME client.

caddytls/client.go

@@ -236,9 +236,11 @@ func (c *ACMEClient) Renew(name string) error {
 	var newCertMeta acme.CertificateResource
 	var success bool
 	for attempts := 0; attempts < 2; attempts++ {
+		namesObtaining.Add([]string{name})
 		acmeMu.Lock()
 		newCertMeta, err = c.RenewCertificate(certMeta, true)
 		acmeMu.Unlock()
+		namesObtaining.Remove([]string{name})
 		if err == nil {
 			success = true
 			break

caddytls/config.go

@@ -214,9 +214,11 @@ func (c *Config) renewCertName(name string, allowPrompts bool) error {
 	var newCertMeta acme.CertificateResource
 	var success bool
 	for attempts := 0; attempts < 2; attempts++ {
+		namesObtaining.Add([]string{name})
 		acmeMu.Lock()
 		newCertMeta, err = client.RenewCertificate(certMeta, true)
 		acmeMu.Unlock()
+		namesObtaining.Remove([]string{name})
 		if err == nil {
 			success = true
 			break