Started LDAP support

util/startup/startup.go

@@ -0,0 +1,31 @@
+package startup
+
+// Pre-defined queues...
+var (
+	Logger    StartupQueue
+	PostFlags StartupQueue
+)
+
+type StartupQueue struct {
+	items  []func()
+	hasRun bool
+}
+
+func (q *StartupQueue) Add(initFn ...func()) {
+	if q.hasRun {
+		panic("Added init function after startup")
+	}
+	for _, fn := range initFn {
+		q.items = append(q.items, fn)
+	}
+}
+
+func (q *StartupQueue) Run() {
+	if q.hasRun {
+		panic("Attempted to run init function twice")
+	}
+	q.hasRun = true
+	for _, fn := range q.items {
+		fn()
+	}
+}