cmd/tailscale, ipn/ipnlocal: add ts_omit_webclient

Fixes #17063
Updates #12614

Change-Id: I0a189f6a4d1c4558351e3195839867725774fa96
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/tailscaled/deps_test.go

@@ -4,6 +4,7 @@
 package main
 
 import (
+	"strings"
 	"testing"
 
 	"tailscale.com/tstest/deptest"
@@ -41,3 +42,22 @@ func TestOmitSyspolicy(t *testing.T) {
 		},
 	}.Check(t)
 }
+
+// Test that we can build a binary without reflect.MethodByName.
+// See https://github.com/tailscale/tailscale/issues/17063
+func TestOmitReflectThings(t *testing.T) {
+	deptest.DepChecker{
+		GOOS:   "linux",
+		GOARCH: "amd64",
+		Tags:   "ts_include_cli,ts_omit_systray,ts_omit_debugeventbus,ts_omit_webclient",
+		BadDeps: map[string]string{
+			"text/template": "unexpected text/template usage",
+			"html/template": "unexpected text/template usage",
+		},
+		OnDep: func(dep string) {
+			if strings.Contains(dep, "systray") {
+				t.Errorf("unexpected systray dep %q", dep)
+			}
+		},
+	}.Check(t)
+}