tests: "am_using_tap=yes" -> "am_test_protocol=tap" And similarly, "am_using_tap=no" -> "am_test_protocol=none". The new '$am_test_protocol' name is clearer, and will allow the easy addition of further test protocols in the future. This is not truly relevant for automake, but we are trying to make some parts of our testsuite framework as general as possible, in view of a future move to a more generic project like Gnulib. * Makefile.am, t/ax/am-test-lib.sh, t/ax/test-defs.in, t/ax/test-lib.sh, t/self-check-env-sanitize.tap, t/self-check-tap.sh: Adjust. * syntax-checks.mk (sc_tests_obsolete_variables): Add 'am_using_tap' to the list of obsolete variables to check against. Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>