Avoid double slashes in ODoH relay URLs

.ci/test-odoh-proxied.toml

@@ -9,7 +9,7 @@ file = 'query.log'
   stamp = 'sdns://BQcAAAAAAAAAF29kb2guY2xvdWRmbGFyZS1kbnMuY29tCi9kbnMtcXVlcnk'
 
   [static.'odohrelay']
-  stamp = 'sdns://hQcAAAAAAAAAAAAdcHJveHkub2RvaC5jbG91ZGZsYXJlLWRucy5jb20FcHJveHk'
+  stamp = 'sdns://hQcAAAAAAAAAAAAdcHJveHkub2RvaC5jbG91ZGZsYXJlLWRucy5jb20GL3Byb3h5'
 
 [anonymized_dns]
 routes = [

dnscrypt-proxy/serversInfo.go

@@ -419,7 +419,7 @@ func route(proxy *Proxy, name string) (*Relay, error) {
 		dlog.Noticef("Anonymizing queries for [%v] via [%v]", name, relayName)
 		return &Relay{Proto: stamps.StampProtoTypeDNSCryptRelay, Dnscrypt: &DNSCryptRelay{RelayUDPAddr: relayUDPAddr, RelayTCPAddr: relayTCPAddr}}, nil
 	case stamps.StampProtoTypeODoHRelay:
-		target, err := url.Parse("https://" + relayCandidateStamp.ProviderName + "/" + relayCandidateStamp.Path)
+		target, err := url.Parse("https://" + url.PathEscape(relayCandidateStamp.ProviderName) + relayCandidateStamp.Path)
 		if err != nil {
 			return nil, err
 		}