Porters: please make sure you use bsd.port.mk 1.75 or later when
updating ports. That version of the makefile adds all sums. Previous
versions of the makefile will still work for people installing ports.
Do not delete ${PREFIX}/lib/icbserverdb during pkg_delete,
notify user to do it manually instead;
Do not overwrite ${PREFIX}/lib/icbserverdb if already exists.