Config prompts for information needed to build and install the various
packages you have extracted and builds a "meta" Makefile for each package.

In general, the "meta" Makefile in each package contains 5 targets (steps).
Each target is dependent on the previous target and creates a flag file
when complete (i.e. "make extract" creates a file named ".extract_done"
when the extract step is completed).  The targets are:

    extract	- extract the sources from the tar file (distfiles)
    patch	- apply patches for the package (patches)
    configure	- configure the package
    build	- build the package
    install	- install the package

