moving a bunch of packages under pkg (#124)

* moving a bunch of packages under pkg

* fix gen

* fix tst

* oops

* fix test fo real

* parse mx/a

pkg/dnsresolver/dnscache_test.go

@@ -0,0 +1,31 @@
+package dnsresolver
+
+import "testing"
+
+func TestDnsCache(t *testing.T) {
+
+	cache := &dnsCache{}
+	cache.put("one", "txt", []string{"a", "b", "c"})
+	cache.put("two", "txt", []string{"d", "e", "f"})
+
+	a, b := cache.get("one", "txt")
+	if !(b == true && len(a) == 3 && a[0] == "a" && a[1] == "b" && a[2] == "c") {
+		t.Errorf("one-txt didn't work")
+	}
+
+	a, b = cache.get("two", "txt")
+	if !(b == true && len(a) == 3 && a[0] == "d" && a[1] == "e" && a[2] == "f") {
+		t.Errorf("one-txt didn't work")
+	}
+
+	a, b = cache.get("three", "txt")
+	if !(b == false) {
+		t.Errorf("three-txt didn't work")
+	}
+
+	a, b = cache.get("two", "not")
+	if !(b == false) {
+		t.Errorf("two-not didn't work")
+	}
+
+}