This directory contains Axyl database patch scripts. These
are named in a specific format:
  upgrade_N.N.N_to_M.M.M.sql

The varying parts of this are N.N.N which represents the 'old'
version of the schema the patch is being applied to, and
M.M.M which is the version of the schema that the database will
be compliant with after the patch.

These patch scripts are applied by the following shell script
which is normally run by the Debian postinst script:

 AXYL_HOME/install/upgrade-axyl-databases.sh

