This plugin allows to locally override the geotools projection definitions in mapfishapp and extractorapp.
This is useful to introduce new definitions, or when they are incorrect (eg: EPSG:27572).
If the property CUSTOM_EPSG_FILE is set to a valid file, its definitions are loaded.
For instance, in /etc/default/tomcat-georchestra:
JAVA_OPTS="$JAVA_OPTS -DCUSTOM_EPSG_FILE=/opt/epsg.properties"
If there is no such property, the internal epsg.properties file is used.