[buttonbar 1] or [buttonbar 2] directive instead of the equivalent
HTML, and is designed to make it easy to change the
look of your pages with the change of one file. If the file does not exist
at program configuration time, the tag is simply stripped. The line in the
catalog.cfg file takes the form of the directive, followed by any number of vend-style
file names (relative to the PageDir, with no .html suffix).
ButtonBars bars/button0 bars/button1 bars/button2 bars/button3
The ButtonBars directive is deprecated in favor of Variable and UserTag.