Maint: move Openvpn package files

- Move internal/openvpn/config/*.go to internal/openvpn/
- Move internal/openvpn/setup.go to internal/vpn/openvpn.go

internal/openvpn/run.go

@@ -0,0 +1,41 @@
+package openvpn
+
+import (
+	"context"
+
+	"github.com/qdm12/gluetun/internal/configuration"
+	"github.com/qdm12/golibs/logging"
+)
+
+type Runner interface {
+	Run(ctx context.Context, errCh chan<- error, ready chan<- struct{},
+		logger logging.Logger, settings configuration.OpenVPN)
+}
+
+func (c *Configurator) Run(ctx context.Context, errCh chan<- error,
+	ready chan<- struct{}, logger logging.Logger, settings configuration.OpenVPN) {
+	stdoutLines, stderrLines, waitError, err := c.start(ctx, settings.Version, settings.Flags)
+	if err != nil {
+		errCh <- err
+		return
+	}
+
+	streamCtx, streamCancel := context.WithCancel(context.Background())
+	streamDone := make(chan struct{})
+	go streamLines(streamCtx, streamDone, logger,
+		stdoutLines, stderrLines, ready)
+
+	select {
+	case <-ctx.Done():
+		<-waitError
+		close(waitError)
+		streamCancel()
+		<-streamDone
+		errCh <- ctx.Err()
+	case err := <-waitError:
+		close(waitError)
+		streamCancel()
+		<-streamDone
+		errCh <- err
+	}
+}