[tex-eplain] Colors with hyperlinks

[Karl Berry]

      \def\enablecolors#1{%
        \input miniltx
        \def\Gin at driver{#1}%
        \input color.sty
      }

This sounds good.

    Again, we can make the parameter optional,
    and do the detection if it is omitted.  

Definitely.

  \makeatletter
  \resetatcatcode

On a different topic, maybe we should provide these in Eplain.  They'd
be handy, occasionally.

Thanks,
k