security: Add SignatureSha256

Change-Id: Id9a61f898d12a6b289a24adb594471b26d3513d6
diff --git a/src/security/validator-regex.cpp b/src/security/validator-regex.cpp
index 85fb534..ec22de8 100644
--- a/src/security/validator-regex.cpp
+++ b/src/security/validator-regex.cpp
@@ -13,7 +13,7 @@
 
 #include "../util/logging.hpp"
 
-INIT_LOGGER("ndn::ValidatorRegex");
+INIT_LOGGER("ndn.ValidatorRegex");
 
 using namespace std;