x86_64 is used as a baseline: the "x86_64" entry, whatever status it has,
is transformed into "all", and then the other entries in ARCHITECTURES
either dropped or rearranged appropriately.
* Bump version.
* Build with libiconv, libintl, libncurses and libreadline.
* Mark x86 and x86_64 as tested.
* Sort cmd:* in BUILD_PREREQUIRES.
* Use mirror redirector for SOURCE_URI.
* Add TEST() with "make check".