go.mod: update taskgroup to v0.11.0 and fix usage

Author: creachadair

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/creachadair/mds v0.21.2
 	github.com/creachadair/mhttp v0.0.0-20240908014720-a77225a19b8b
 	github.com/creachadair/scheddle v0.0.0-20240919010233-b6854e09d972
-	github.com/creachadair/taskgroup v0.9.4
+	github.com/creachadair/taskgroup v0.11.0
 	github.com/creachadair/tlsutil v0.0.0-20240907154432-0ca1e46ff43d
 	github.com/goproxy/goproxy v0.17.2
 	golang.org/x/sync v0.8.0

go.sum

@@ -56,8 +56,8 @@ github.com/creachadair/msync v0.3.0 h1:7FoPzwrM4gAdfsj7mcVyodKV82fArJaKcgr9j9whY
 github.com/creachadair/msync v0.3.0/go.mod h1:XjAfMt+upDhbx3FeGJ1zkqQIm55E9xw/pWzITwVaIoI=
 github.com/creachadair/scheddle v0.0.0-20240919010233-b6854e09d972 h1:bWA80ILWcqGxveRewDQwf4nRF8E90SiCxqVo0DaOFxg=
 github.com/creachadair/scheddle v0.0.0-20240919010233-b6854e09d972/go.mod h1:PwCiUu3BYgSeOurdoA/+kDA5X39Z9JXRKDGUpkeKPCY=
-github.com/creachadair/taskgroup v0.9.4 h1:dGMg5fkBc5c5QQ1LD6JZCMw45mH7ptXbW64WpTKzwbA=
-github.com/creachadair/taskgroup v0.9.4/go.mod h1:9oDDPt/5QPS4iylvPMC81GRlj+1je8AFDbjUh4zaQWo=
+github.com/creachadair/taskgroup v0.11.0 h1:ALpBe7Qds+JyM4ZQKISLFyapHRjVb00eOQ88S0mzVNo=
+github.com/creachadair/taskgroup v0.11.0/go.mod h1:9oDDPt/5QPS4iylvPMC81GRlj+1je8AFDbjUh4zaQWo=
 github.com/creachadair/tlsutil v0.0.0-20240907154432-0ca1e46ff43d h1:euNk+jFY3ytIBBMtXY80gbMK0pA4bXTYHbkxwEUgnKU=
 github.com/creachadair/tlsutil v0.0.0-20240907154432-0ca1e46ff43d/go.mod h1:QMYeSCtv6WYPxroqKtL1/5p4vG2SdWiBYiTxo4y0FMc=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=

lib/gobuild/gobuild.go

@@ -76,7 +76,7 @@ type S3Cache struct {
 	// Tracks tasks pushing cache writes to S3.
 	initOnce sync.Once
 	push     *taskgroup.Group
-	start    func(taskgroup.Task) *taskgroup.Group
+	start    func(taskgroup.Task)
 
 	getLocalHit  expvar.Int // count of Get hits in the local cache
 	getFaultHit  expvar.Int // count of Get hits faulted in from S3

lib/modproxy/modproxy.go

@@ -93,7 +93,7 @@ type S3Cacher struct {
 	// Tracks tasks interacting with S3 in the background.
 	initOnce sync.Once
 	tasks    *taskgroup.Group
-	start    func(taskgroup.Task) *taskgroup.Group
+	start    func(taskgroup.Task)
 	sema     *semaphore.Weighted
 
 	pathError     expvar.Int // errors constructing file paths

lib/revproxy/revproxy.go

@@ -120,7 +120,7 @@ type Server struct {
 
 	initOnce sync.Once
 	tasks    *taskgroup.Group
-	start    func(taskgroup.Task) *taskgroup.Group
+	start    func(taskgroup.Task)
 	mcache   *cache.Cache[string, memCacheEntry] // short-lived mutable objects
 	expire   *scheddle.Queue                     // cache expirations