Comment 15 for bug 144431

(In reply to comment #1)
> Such hostnames are invalid, see section 2 of RFC3696.
> For hostnames, hyphen can be only in the middle, not at the start of at the end.
>

Well, it's true, but
1) hostnames starting with numeric value are also not valid, but can be resolved via gethostbyname()
(i.e. ping 12345.livejournal.com);

2) We getting odd behaviour on various system. Even worse - on same machine using different tools
(nslookup vs. ping).