dskqxs: fix missing EV_DISPATCH define

Oops, IO::KQueue support was broken due to this missing
constant.  Add a new ds-kqxs.t test case to ensure we
test the IO::KQueue path if IO::KQueue is available.

1 files changed, 1 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index 9fd639f5..a50c1246 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -207,6 +207,7 @@ t/config_limiter.t
 t/content_id.t
 t/convert-compact.t
 t/data/0001.patch
+t/ds-kqxs.t
 t/ds-leak.t
 t/ds-poll.t
 t/edit.t