\usepackage[T1]{url}
\newcommand{\email}{\begingroup \urlstyle{sf}\Url}
\newcommand{\file}{\begingroup \urlstyle{tt}\Url}
\newcommand{\envvar}{\begingroup \urlstyle{tt}\Url}
\newcommand{\makevar}{\begingroup \urlstyle{tt}\Url}
\newcommand{\corbauri}{\begingroup \urlstyle{tt}\Url}
\def\weburl{\begingroup%
\def\UrlLeft##1\UrlRight{\ahrefurl{##1}}%
\urlstyle{tt}%
\Url}
