Error in parsing lock token

[lscorcia]

The lock token is emitted as (urn:uuid:[GUID]), but later it is parsed as if it were (<[GUID]>).

In file WebDavExtensions.cs, the method GetLockTokenIfHeader should be changed as follows:

public static Guid? GetLockTokenIfHeader(this IHttpListenerRequest request)
{
	if (!request.Headers.AllKeys.Contains("If"))
		return null;

	string ifHeaderValue = request.Headers["If"];
	int posLastColon = ifHeaderValue.LastIndexOf(':');
	int posUrnClose = ifHeaderValue.IndexOf('>');
	string t = ifHeaderValue.Substring(posLastColon + 1, posUrnClose - posLastColon - 1);
	return new Guid(t);
}