the overhead of running Jade.
Added an ${EXTRA_CATALOGS} variable if your document needs to be
processed with additional SGML catalogs (currently not used by anything,
but might be some day).
Switched the meaning of ${JADEFLAGS} and ${JADEOPTS} for consistency. All
user-tweakable program options now match ${*FLAGS}.
into a variety of different formats. Contains a lot of code that used
to be in doc/en/handbook/Makefile, the commit log for that file will
probably prove useful as well.
