replace packages slog and slices from golang.org/x/exp with stdlib

since we are now at go1.21 as minimum.

mox-/admin.go

@@ -11,6 +11,7 @@ import (
 	"crypto/x509"
 	"encoding/pem"
 	"fmt"
+	"log/slog"
 	"net"
 	"net/url"
 	"os"
@@ -20,7 +21,6 @@ import (
 	"time"
 
 	"golang.org/x/exp/maps"
-	"golang.org/x/exp/slog"
 
 	"github.com/mjl-/adns"
 

mox-/config.go

@@ -16,6 +16,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net"
 	"net/http"
 	"net/url"
@@ -29,7 +30,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/exp/slog"
 	"golang.org/x/text/unicode/norm"
 
 	"github.com/mjl-/autocert"

mox-/forkexec_unix.go

@@ -3,12 +3,11 @@
 package mox
 
 import (
+	"log/slog"
 	"os"
 	"os/signal"
 	"strings"
 	"syscall"
-
-	"golang.org/x/exp/slog"
 )
 
 // Fork and exec as unprivileged user.

mox-/tlsrecv.go

@@ -3,8 +3,7 @@ package mox
 import (
 	"crypto/tls"
 	"fmt"
-
-	"golang.org/x/exp/slog"
+	"log/slog"
 
 	"github.com/mjl-/mox/mlog"
 )

mox-/webappfile.go

@@ -7,14 +7,13 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"os"
 	"strings"
 	"sync"
 	"time"
 
-	"golang.org/x/exp/slog"
-
 	"github.com/mjl-/mox/mlog"
 	"github.com/mjl-/mox/moxvar"
 )