feat(vpn): rotate filtered servers on internal vpn restarts

- Fix #290

internal/provider/slickvpn/connection.go

@@ -10,5 +10,5 @@ func (p *Provider) GetConnection(selection settings.ServerSelection, ipv6Support
 	connection models.Connection, err error,
 ) {
 	defaults := utils.NewConnectionDefaults(443, 443, 0) //nolint:mnd
-	return utils.GetConnection(p.Name(), p.storage, selection, defaults, ipv6Supported, p.randSource)
+	return utils.GetConnection(p.Name(), p.storage, selection, defaults, ipv6Supported, p.connPicker)
 }

internal/provider/slickvpn/provider.go

@@ -1,27 +1,26 @@
 package slickvpn
 
 import (
-	"math/rand"
 	"net/http"
 
 	"github.com/qdm12/gluetun/internal/constants/providers"
 	"github.com/qdm12/gluetun/internal/provider/common"
 	"github.com/qdm12/gluetun/internal/provider/slickvpn/updater"
+	"github.com/qdm12/gluetun/internal/provider/utils"
 )
 
 type Provider struct {
 	storage    common.Storage
-	randSource rand.Source
+	connPicker *utils.ConnectionPicker
 	common.Fetcher
 }
 
-func New(storage common.Storage, randSource rand.Source,
-	client *http.Client, updaterWarner common.Warner,
+func New(storage common.Storage, client *http.Client, updaterWarner common.Warner,
 	parallelResolver common.ParallelResolver,
 ) *Provider {
 	return &Provider{
 		storage:    storage,
-		randSource: randSource,
+		connPicker: utils.NewConnectionPicker(),
 		Fetcher:    updater.New(client, updaterWarner, parallelResolver),
 	}
 }