Switch to Go 1.16.

Fixes #1370

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

.github/workflows/coverage.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/cross-darwin.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/cross-freebsd.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/cross-openbsd.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/cross-windows.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/depaware.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
 
     - name: Check out code
       uses: actions/checkout@v1

.github/workflows/license.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
 
     - name: Check out code
       uses: actions/checkout@v1

.github/workflows/linux.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/linux32.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory

.github/workflows/staticcheck.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
 
     - name: Check out code
       uses: actions/checkout@v1

.github/workflows/windows.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.15.x
+        go-version: 1.16.x
 
     - name: Checkout code
       uses: actions/checkout@v2

Dockerfile

@@ -38,7 +38,7 @@
 #     $ docker exec tailscaled tailscale status
 
 
-FROM golang:1.15-alpine AS build-env
+FROM golang:1.16-alpine AS build-env
 
 WORKDIR /go/src/tailscale
 
@@ -48,7 +48,8 @@ RUN go mod download
 
 COPY . .
 
-ARG goflags_arg # default intentionally unset
+# see build_docker.sh
+ARG goflags_arg=""
 ENV GOFLAGS=$goflags_arg
 
 RUN go install -v ./cmd/...

README.md

@@ -43,7 +43,7 @@ If your distro has conventions that preclude the use of
 distro's way, so that bug reports contain useful version information.
 
 We only guarantee to support the latest Go release and any Go beta or
-release candidate builds (currently Go 1.15) in module mode. It might
+release candidate builds (currently Go 1.16) in module mode. It might
 work in earlier Go versions or in GOPATH mode, but we're making no
 effort to keep those working.
 

cmd/tailscale/depaware.txt

@@ -35,7 +35,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
      💣 tailscale.com/net/tshttpproxy                                from tailscale.com/derp/derphttp+
         tailscale.com/paths                                          from tailscale.com/cmd/tailscale/cli+
         tailscale.com/safesocket                                     from tailscale.com/cmd/tailscale/cli
-     💣 tailscale.com/syncs                                          from tailscale.com/net/interfaces+
+        tailscale.com/syncs                                          from tailscale.com/net/interfaces+
         tailscale.com/tailcfg                                        from tailscale.com/cmd/tailscale/cli+
    W    tailscale.com/tsconst                                        from tailscale.com/net/interfaces
         tailscale.com/types/empty                                    from tailscale.com/ipn
@@ -134,7 +134,8 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
         hash/maphash                                                 from go4.org/mem
         html                                                         from tailscale.com/ipn/ipnstate
         io                                                           from bufio+
-        io/ioutil                                                    from crypto/tls+
+        io/fs                                                        from crypto/rand+
+        io/ioutil                                                    from golang.org/x/oauth2/internal+
         log                                                          from expvar+
         math                                                         from compress/flate+
         math/big                                                     from crypto/dsa+

cmd/tailscaled/depaware.txt

@@ -101,7 +101,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         tailscale.com/portlist                                       from tailscale.com/ipn/ipnlocal
         tailscale.com/safesocket                                     from tailscale.com/ipn/ipnserver
         tailscale.com/smallzstd                                      from tailscale.com/ipn/ipnserver+
-     💣 tailscale.com/syncs                                          from tailscale.com/net/interfaces+
+        tailscale.com/syncs                                          from tailscale.com/net/interfaces+
         tailscale.com/tailcfg                                        from tailscale.com/control/controlclient+
    W    tailscale.com/tsconst                                        from tailscale.com/net/interfaces
         tailscale.com/tstime                                         from tailscale.com/wgengine/magicsock
@@ -224,10 +224,10 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         hash/crc32                                                   from compress/gzip+
         hash/fnv                                                     from tailscale.com/wgengine/magicsock
         hash/maphash                                                 from go4.org/mem
-        html                                                         from html/template+
-        html/template                                                from net/http/pprof
+        html                                                         from net/http/pprof+
         io                                                           from bufio+
-        io/ioutil                                                    from crypto/tls+
+        io/fs                                                        from crypto/rand+
+        io/ioutil                                                    from github.com/godbus/dbus/v5+
         log                                                          from expvar+
         math                                                         from compress/flate+
         math/big                                                     from crypto/dsa+
@@ -262,8 +262,6 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         sync/atomic                                                  from context+
         syscall                                                      from crypto/rand+
         text/tabwriter                                               from runtime/pprof
-        text/template                                                from html/template
-        text/template/parse                                          from html/template+
         time                                                         from compress/gzip+
         unicode                                                      from bytes+
         unicode/utf16                                                from encoding/asn1+

go.mod

@@ -1,6 +1,6 @@
 module tailscale.com
 
-go 1.15
+go 1.16
 
 require (
 	github.com/alexbrainman/sspi v0.0.0-20180613141037-e580b900e9f5