BROKEN (with the BROKEN line as far away as possible from the regular
center of activity) and forgot to move them to the right place when
I changed these to MANUAL_PACKAGE_BUILD. Sorry!
bsd.port.mk that will be committed soon, this will disable automatic
package building when PACKAGE_BUILDING is defined (so they can be
built from separate scripts).
These are no-ops for ordinary users (i.e., when PACKAGE_BUILDING is
not defined).