This extra source folder (src-config-14/) is here to support separately 
compiling some classes to target a 1.4 JVM. This is needed to allow SetConfig
to correctly detect the version of older 1.4 JVMs. See Bug 314483 for details.

Classes in this folder must be manually compiled to target JVM 1.4 and the
corresponding .class files should be copied into classes-config-14 in order
to be included in the final output.