// the root label it is ignored. Not other syntax checks are performed.
func dnsJoin(labels ...string) string {
	if len(labels) == 0 {
		return ""
	}
	ll := len(labels)
	if labels[ll-1] == "." {
		return strings.Join(labels[:ll-1], ".") + "."
	}
	return dns.Fqdn(strings.Join(labels, "."))
}

// msgUnPath converts a etcd path to domainName.
func msgUnPath(s string) string {

	ADDV16		$65535, R4, R5	// ERROR "the constant must be a multiple of 65536."
	SC		R4, 1(R5)	// ERROR "offset must be a multiple of 4."
	SCV		R4, 1(R5)	// ERROR "offset must be a multiple of 4."
	LL		1(R5), R4	// ERROR "offset must be a multiple of 4."

	MOVBU	R4, 65536(R5)			// 1e020014de971000c4030029
	MOVBU	R4, 4096(R5)			// 3e000014de971000c4030029
	SC	R4, 65536(R5)			// 1e040010de971000c4030021
	SCV	R4, 65536(R5)			// 1e040010de971000c4030023
	LL	65536(R5), R4			// 1e040010de971000c4030020
	LLV	65536(R5), R4			// 1e040010de971000c4030022
	MOVW	y+65540(FP), R4			// 1e020014de8f1000c4338028
	MOVWU	y+65540(FP), R4			// 1e020014de8f1000c433802a

	MOVB	y+8(FP), R4		// 64400028
	MOVBU	y+8(FP), R4		// 6440002a
	MOVW	1(R5), R4		// a4048028
	MOVWU	1(R5), R4		// a404802a
	MOVV	1(R5), R4		// a404c028
	MOVB	1(R5), R4		// a4040028
	MOVBU	1(R5), R4		// a404002a
	LL	4096(R5), R4		// a4001020
	LLV	4096(R5), R4		// a4001022
	MOVW	$4(R4), R5		// 8510c002
	MOVV	$4(R4), R5		// 8510c002
	MOVW	$-1, R4			// 04fcff02
	MOVV	$-1, R4			// 04fcff02
	MOVW	$1, R4			// 04048003

s&etwolfbew,udgniht.&cersid.&dvreser,tsuc,?dorp.tsuc,gnitset.&dvreser,tsuc,?ved.&dvreser,tsuc,????ude?v&gib.0ku,og??w&hs,olfbew,?x&bdrym,cq,rotide,?ysrab,zzq,?b?d&ar?u&a?ts???j?r?syhp??j!.&dhp?g&ne?ro??hcs?i&a?rga??lim?m&f?oc??rep?ten?ude?v&og?t????ll&ag?o??m!.&gro?moc?ten?ude?vog??g?il?mi?orp??n!.&a&0&b-ekhgnark--nx?c-iehsrgev--nx?g-lksedlig--nx?k-negnanvk--nx??1&p-nedragy--nx?q-&asierrs--nx?grebsnt--nx?lado-rs--nx?n&egnidl--nx?orf-rs--nx??regnayh--nx?ssofenh--nx??r-datsgrt--nx?s-ladrjts--nx?v-...

      <!-- http://mpgedit.org/mpgedit/mpeg_format/MP3Format.html -->
      <!-- Bit pattern for first two bytes: 11111111 111VVLLC    -->
      <!-- VV = MPEG Audio Version ID; 10 = V2, 11 = V1          -->
      <!-- LL = Layer description; 01 = L3, 10 = L2, 11 = L1     -->
      <!-- C = Protection bit; 0 = CRC, 1 = no CRC               -->
      <match value="0xfff2" type="string" offset="0"/> <!-- V2, L3, CRC -->

<p>
In <a href="https://www.unicode.org/versions/Unicode8.0.0/">The Unicode Standard 8.0</a>,
Section 4.5 "General Category" defines a set of character categories.
Go treats all characters in any of the Letter categories Lu, Ll, Lt, Lm, or Lo
as Unicode letters, and those in the Number category Nd as Unicode digits.
</p>

<h3 id="Letters_and_digits">Letters and digits</h3>

<p>