parallel-tests: redo lazy checking: recheck and RECHECK_LOGS. Replace the LAZY_TEST_SUITE API with a simpler yet more powerful one: RECHECK_LOGS specifies those tests which are to be removed in any case before testing. Provide a `recheck' convenience target to set RECHECK_LOGS to all failed and unexpectedly passed tests. Document several ways to limit the set of tests run. * lib/am/check.am [PARALLEL_TESTS] (RECHECK_LOGS): New variable, default to $(TESTS_LOGS). (check-TESTS): Remove $(RECHECK_LOGS) not $(TEST_LOGS). Drop use of LAZY_TEST_SUITE. ($(TEST_SUITE_LOG)): Do not output note about lazy rerun, as LAZY_TEST_SUITE is gone. (recheck): New target. (recheck-am, recheck-TESTS): New internal targets. * doc/automake.texi (Tests): Update @vindex for TESTS and TEST_LOGS. Replace description of LAZY_TEST_SUITE with a list of ways the set of tests to be run can be modified. Document RECHECK_LOGS and the recheck target. * tests/defs.in: Unset RECHECK_LOGS not LAZY_TEST_SUITE. * tests/parallel-tests.test: Adjust, replacing LAZY_TEST_SUITE with corresponding RECHECK_LOGS settings, and add another RECHECK_LOGS test. * tests/parallel-tests9.test: New test, test `recheck'. * tests/Makefile.am: Update. Suggestion and different implementation by Akim Demaille. Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>