Maintenance: split each provider in a package

- Fix VyprVPN port
- Fix missing Auth overrides

internal/provider/privado/connection.go

@@ -0,0 +1,44 @@
+package privado
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/qdm12/gluetun/internal/configuration"
+	"github.com/qdm12/gluetun/internal/constants"
+	"github.com/qdm12/gluetun/internal/models"
+	"github.com/qdm12/gluetun/internal/provider/utils"
+)
+
+var ErrProtocolUnsupported = errors.New("network protocol is not supported")
+
+func (p *Privado) GetOpenVPNConnection(selection configuration.ServerSelection) (
+	connection models.OpenVPNConnection, err error) {
+	const port = 1194
+	const protocol = constants.UDP
+	if selection.TCP {
+		return connection, fmt.Errorf("%w: TCP for provider Privado", ErrProtocolUnsupported)
+	}
+
+	servers, err := p.filterServers(selection)
+	if err != nil {
+		return connection, err
+	}
+
+	connections := make([]models.OpenVPNConnection, len(servers))
+	for i := range servers {
+		connection := models.OpenVPNConnection{
+			IP:       servers[i].IP,
+			Port:     port,
+			Protocol: protocol,
+			Hostname: servers[i].Hostname,
+		}
+		connections[i] = connection
+	}
+
+	if selection.TargetIP != nil {
+		return utils.GetTargetIPConnection(connections, selection.TargetIP)
+	}
+
+	return utils.PickRandomConnection(connections, p.randSource), nil
+}