(b)make install change in pkgsrc

Joerg Sonnenberger announced new behavior in pkgsrc: Performing “bmake install” in pkgsrc with a package that supports DESTDIR will build a binary package and then install from that package.  This means a package will be successfully build before the installation process is started, and I assume is to assist further work down the road.

Details: The old behavior was to build and install directly, which “bmake stage-install” can reproduce.  DESTDIR support means that the software can be installed as non-root.