doc-src/pdfsetup.sty

proper symbol markup with \isamath, \isatext;
support sub/super scripts:

\@ifundefined{pdfoutput}{\usepackage{../url}}
{\usepackage[pdftex,a4paper,colorlinks=true]{hyperref}
  \gdef\bold#1{\textbf{\hyperpage{#1}}}}

\urlstyle{rm}