go.mod: Migrate to golang.org/x/term (#4073)

golang.org/x/crypto/ssh/terminal is deprecated in favor of golang.org/x/term

See https://github.com/caddyserver/caddy/pull/4073/checks?check_run_id=2152150495
Error: SA1019: package golang.org/x/crypto/ssh/terminal is deprecated: this package moved to golang.org/x/term.  (staticcheck)

See https://github.com/caddyserver/caddy/pull/4073/checks?check_run_id=2152228516
Error: SA1019: package golang.org/x/crypto/ssh/terminal is deprecated: this package moved to golang.org/x/term.  (staticcheck)

Test: go test -count=1 './...'

4 files changed, 12 insertions, 8 deletions

diff --git a/go.mod b/go.mod
index 91f2a19..4e462ab 100644
--- a/go.mod
+++ b/go.mod
@@ -26,6 +26,7 @@ require (
 	go.uber.org/zap v1.16.0
 	golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de
 	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b
+	golang.org/x/term v0.0.0-20210317153231-de623e64d2a6
 	google.golang.org/genproto v0.0.0-20200806141610-86f49bd18e98
 	google.golang.org/protobuf v1.24.0 // cannot upgrade until warning is fixed
 	gopkg.in/natefinch/lumberjack.v2 v2.0.0
diff --git a/go.sum b/go.sum
index 2a292d9..5268b11 100644
--- a/go.sum
+++ b/go.sum
@@ -926,8 +926,11 @@ golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201214210602-f9fddec55a1e h1:AyodaIpKjppX+cBfTASF2E1US3H2JFBj920Ot3rtDjs=
 golang.org/x/sys v0.0.0-20201214210602-f9fddec55a1e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20210317153231-de623e64d2a6 h1:EC6+IGYTjPpRfv9a2b/6Puw0W+hLtAhkV1tPsXhutqs=
+golang.org/x/term v0.0.0-20210317153231-de623e64d2a6/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.0.0-20170915090833-1cbadb444a80/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/logging.go b/logging.go
index 60ca487..7837145 100644
--- a/logging.go
+++ b/logging.go
@@ -27,7 +27,7 @@ import (
 
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
-	"golang.org/x/crypto/ssh/terminal"
+	"golang.org/x/term"
 )
 
 func init() {
@@ -670,7 +670,7 @@ func newDefaultProductionLog() (*defaultCustomLog, error) {
 
 func newDefaultProductionLogEncoder(colorize bool) zapcore.Encoder {
 	encCfg := zap.NewProductionEncoderConfig()
-	if terminal.IsTerminal(int(os.Stdout.Fd())) {
+	if term.IsTerminal(int(os.Stdout.Fd())) {
 		// if interactive terminal, make output more human-readable by default
 		encCfg.EncodeTime = func(ts time.Time, encoder zapcore.PrimitiveArrayEncoder) {
 			encoder.AppendString(ts.UTC().Format("2006/01/02 15:04:05.000"))
diff --git a/modules/caddyhttp/caddyauth/command.go b/modules/caddyhttp/caddyauth/command.go
index a2ae755..597681b 100644
--- a/modules/caddyhttp/caddyauth/command.go
+++ b/modules/caddyhttp/caddyauth/command.go
@@ -25,7 +25,7 @@ import (
 
 	"github.com/caddyserver/caddy/v2"
 	caddycmd "github.com/caddyserver/caddy/v2/cmd"
-	"golang.org/x/crypto/ssh/terminal"
+	"golang.org/x/term"
 )
 
 func init() {
@@ -67,27 +67,27 @@ func cmdHashPassword(fs caddycmd.Flags) (int, error) {
 
 	if len(plaintext) == 0 {
 		fd := int(os.Stdin.Fd())
-		if terminal.IsTerminal(fd) {
+		if term.IsTerminal(fd) {
 			// ensure the terminal state is restored on SIGINT
-			state, _ := terminal.GetState(fd)
+			state, _ := term.GetState(fd)
 			c := make(chan os.Signal, 1)
 			signal.Notify(c, os.Interrupt)
 			go func() {
 				<-c
-				_ = terminal.Restore(fd, state)
+				_ = term.Restore(fd, state)
 				os.Exit(caddy.ExitCodeFailedStartup)
 			}()
 			defer signal.Stop(c)
 
 			fmt.Fprint(os.Stderr, "Enter password: ")
-			plaintext, err = terminal.ReadPassword(fd)
+			plaintext, err = term.ReadPassword(fd)
 			fmt.Fprintln(os.Stderr)
 			if err != nil {
 				return caddy.ExitCodeFailedStartup, err
 			}
 
 			fmt.Fprint(os.Stderr, "Confirm password: ")
-			confirmation, err := terminal.ReadPassword(fd)
+			confirmation, err := term.ReadPassword(fd)
 			fmt.Fprintln(os.Stderr)
 			if err != nil {
 				return caddy.ExitCodeFailedStartup, err