Updates keyringer: 493e7ef Keyringer 0.5.6

diff --git a/keyringer b/keyringer
index dc6b6e5d79d2c8b9e04d9e7cfab97fd3f6d49a5d..493e7ef750bd5fbf7db59793776cd9fb75756d3c 160000 (submodule)
--- a/keyringer
+++ b/keyringer
@@ -1 +1 @@
-Subproject commit dc6b6e5d79d2c8b9e04d9e7cfab97fd3f6d49a5d
+Subproject commit 493e7ef750bd5fbf7db59793776cd9fb75756d3c