chore: build with Go 1.26; use Go 1.25 features (#10570)

WaitGroup.Go and built-in gomaxprocs handling.

Signed-off-by: Jakob Borg <jakob@kastelo.net>

cmd/infra/stcrashreceiver/main.go

@@ -28,7 +28,6 @@ import (
 	"github.com/alecthomas/kong"
 	raven "github.com/getsentry/raven-go"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/build"
 	"github.com/syncthing/syncthing/lib/ur"
 )

cmd/infra/strelaypoolsrv/main.go

@@ -27,7 +27,6 @@ import (
 
 	"github.com/syncthing/syncthing/cmd/infra/strelaypoolsrv/auto"
 	"github.com/syncthing/syncthing/lib/assets"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/geoip"
 	"github.com/syncthing/syncthing/lib/protocol"
 	"github.com/syncthing/syncthing/lib/rand"

cmd/infra/strelaypoolsrv/stats.go

@@ -108,8 +108,7 @@ func refreshStats() {
 
 	results := make(chan statsFetchResult, len(relays))
 	for _, rel := range relays {
-		wg.Add(1)
-		go func(rel *relay) {
+		wg.Go(func() {
 			t0 := time.Now()
 			stats := fetchStats(rel)
 			duration := time.Since(t0).Seconds()
@@ -123,8 +122,7 @@ func refreshStats() {
 				relay: rel,
 				stats: fetchStats(rel),
 			}
-			wg.Done()
-		}(rel)
+		})
 	}
 
 	wg.Wait()

cmd/infra/stupgrades/main.go

@@ -25,7 +25,6 @@ import (
 	"github.com/alecthomas/kong"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/syncthing/syncthing/internal/slogutil"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 	"github.com/syncthing/syncthing/lib/httpcache"
 	"github.com/syncthing/syncthing/lib/upgrade"
 )

cmd/infra/ursrv/main.go

@@ -13,7 +13,6 @@ import (
 
 	"github.com/alecthomas/kong"
 	"github.com/syncthing/syncthing/cmd/infra/ursrv/serve"
-	_ "github.com/syncthing/syncthing/lib/automaxprocs"
 )
 
 type CLI struct {