public Uri relToAuth()
{
if (m_scheme == null && m_userInfo == null &&
m_host == null && m_port == null)
return this;
Sections t = new Sections();
t.path = this.m_path;
t.pathStr = this.m_pathStr;
t.query = this.m_query;
t.queryStr = this.m_queryStr;
t.frag = this.m_frag;
return new Uri(t);
}