const net.hexDigit

7 uses

	net (current package)
		dnsclient.go#L46: 		buf = append(buf, hexDigit[v&0xF],
		dnsclient.go#L48: 			hexDigit[v>>4],
		ip.go#L321: 		s[i*2], s[i*2+1] = hexDigit[tn>>4], hexDigit[tn&0xf]
		mac.go#L7: const hexDigit = "0123456789abcdef"
		mac.go#L21: 		buf = append(buf, hexDigit[b>>4])
		mac.go#L22: 		buf = append(buf, hexDigit[b&0xF])