chore: link new TODOs with the relevant issues (#321)

Part of https://github.com/ooni/probe/issues/985

internal/engine/experiment/riseupvpn/riseupvpn.go

@@ -259,6 +259,7 @@ func (m Measurer) Run(ctx context.Context, sess model.ExperimentSession,
 	// measure obfs4 in parallel
 	// TODO(bassosimone): when urlgetter is able to do obfs4 handshakes, here
 	// can possibly also test for the obfs4 handshake.
+	// See https://github.com/ooni/probe/issues/1463.
 	for entry := range multi.CollectOverall(
 		ctx, obfs4Endpoints, 1+len(inputs)+len(openvpnEndpoints), overallCount, "riseupvpn", callbacks) {
 		testkeys.AddGatewayConnectTestKeys(entry, "obfs4")

pkg/oonimkall/internal/tasks/runner.go

@@ -77,6 +77,7 @@ func (r *Runner) newsession(ctx context.Context, logger *ChanLogger) (*engine.Se
 	}
 
 	// TODO(bassosimone): write tests for this functionality
+	// See https://github.com/ooni/probe/issues/1465.
 	var proxyURL *url.URL
 	if r.settings.Proxy != "" {
 		var err error

pkg/oonimkall/session.go

@@ -169,6 +169,7 @@ func newSessionWithContext(ctx context.Context, config *SessionConfig) (*Session
 	}
 
 	// TODO(bassosimone): write tests for this functionality.
+	// See https://github.com/ooni/probe/issues/1465.
 	var proxyURL *url.URL
 	if config.Proxy != "" {
 		var err error