applications_dir and frameworks_dir

I was getting some questions about the configuration applications_dir and frameworks_dir that were added... (and their matching autoconf / configure options of --with-applications-dir and --with-frameworks-dir) They were intended to replace the (currently hardcoded) paths of /Applications/MacPorts and /Library/Frameworks, for when you want to use a different installation location. Just as we already have ${prefix} and now also ${x11prefix} ? They haven't found a suitable variable name yet, though... (so there isn't a way to use them from Portfile/Portgroup) --anders