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.
* Drop the mirror for SOURCE_URI, since the official website is back.
* No changes, other than SOURCE_URI, in primary arch base packages.
* On primary arch devel pacakges, move documentation/man/man3/ and
develop/documentation/libcaca/ to a libcaca_doc arch-independent
package, without any dependencies, though, for more flexibility.
* On secondary arch there is no need to ship man pages, data files
and runtimes (except for caca-config-*), since they are already in
the new doc package. All we need for secondary arch packages is:
in the base package: the shared libs;
in the devel package: caca-config-* and develop/{headers,lib}.
The only file we need to keep in every package is the licence.
* Cosmetic: fix double white spaces, fake tab, add "-e" for sed.
* Add TEST() with "make check". Test results: PASS = TOTAL = 5.
