Turns http://www.loc.gov/marc/bibliographic/ecbdist.html into the format used by MARC::Lint.pm
Takes ecbdist.html as input.
Skips fixed fields and data marked "[OBSOLETE]" Also,
the HTML file doesn't include the 841-88X tags,
so those are hardcoded here.
Originally written by Colin Campbell at Sirsi,
and taken over and modified by Andy Lester.