hg serve fails on Cygwin

[Michal Kvasnica]

>>after changeset 0108c602feb9dacc00b66647b8871bd9ee991b92
>>'hg serve' fails on Cygwin (Win XP + SP2):
> 
> 
> Fix attached and pullable from http://www.serpentine.com/hg
> 
> # HG changeset patch
> # User Bryan O'Sullivan <bos at serpentine.com>
> # Node ID 16ce690c411d56736fde9fcfaac009c3bf999aff
> # Parent  6390c377a9e617e01061d33f3729948d72b6f54f
> Fix problem with "hg serve" on systems not providing IPv6.
> 
> diff -r 6390c377a9e6 -r 16ce690c411d mercurial/hgweb.py
> --- a/mercurial/hgweb.py	Tue Aug  9 17:36:34 2005
> +++ b/mercurial/hgweb.py	Wed Aug 10 20:35:25 2005
> @@ -708,7 +708,12 @@
>      import BaseHTTPServer
>  
>      class IPv6HTTPServer(BaseHTTPServer.HTTPServer):
> -        address_family = socket.AF_INET6
> +        address_family = getattr(socket, 'AF_INET6', None)
> +
> +        def __init__(self, *args, **kwargs):
> +            if self.address_family is None:
> +                raise RepoError('IPv6 not available on this system')
> +            BaseHTTPServer.HTTPServer.__init__(self, *args, **kwargs)
>  
>      class hgwebhandler(BaseHTTPServer.BaseHTTPRequestHandler):
>          def log_error(self, format, *args):
> 

works fine for me, thanks.