Allow for escape spaces in NewRR

Fix omission in NewRR where the parsing does not allow for
escaped spaces (unless \032 was used).

parse_test.go

@@ -545,6 +545,11 @@ func TestParseBackslash(t *testing.T) {
 	} else {
 		t.Logf("Parsed %s\n", r.String())
 	}
+	if r, e := NewRR(`m\ @\ iek.nl. IN 3600 A 127.0.0.1`); e != nil {
+		t.Fatalf("Could not create RR with \\ and \\@ in it")
+	} else {
+		t.Logf("Parsed %s\n", r.String())
+	}
 }
 
 func TestILNP(t *testing.T) {

zscan.go

@@ -510,6 +510,12 @@ func zlexer(s *scan, c chan lex) {
 
 		switch x {
 		case ' ', '\t':
+			if escape {
+				escape = false
+				str[stri] = x
+				stri++
+				break
+			}
 			if quote {
 				// Inside quotes this is legal
 				str[stri] = x