List of FHS approved install directories

[Lance Fredrickson]

I've noticed that installing a self created package to a non-FHS 
compliant directory will the give the message "dpkg: warning: while 
removing directory /usr/local not empty so not removed" upon removal of 
the package. Where in the source code does it list these FHS compliant 
directories?  I'm compiling dpkg for a personal project and would like 
to modify the list of directories that dpkg thinks are FHS compliant.

thanks,
Lance Fredrickson