Add new C TAP Harness based tests

tests/Makefile.inc

tests/TESTS

tests/TODO

tests/acl.c

tests/base32hex.c

tests/base64.c

tests/conf.c

tests/data/sample_conf

tests/descriptor.c

tests/dname.c

tests/dnssec_keys.c

tests/dnssec_nsec3.c

tests/dnssec_sign.c

tests/dnssec_zone_nsec.c

tests/dthreads.c

tests/events.c

tests/fdset.c

tests/hattrie.c

tests/journal.c

tests/rrl.c