Add email challenge module

Refs: #4053

Change-Id: Ic5093fa484df967a760d7503eab2436f5794a385
diff --git a/src/challenge-module.cpp b/src/challenge-module.cpp
index c7ab849..59a0e58 100644
--- a/src/challenge-module.cpp
+++ b/src/challenge-module.cpp
@@ -25,7 +25,7 @@
 namespace ndn {
 namespace ndncert {
 
-_LOG_INIT(ndncert.pinchallenge);
+_LOG_INIT(ndncert.challenge-module);
 
 const std::string ChallengeModule::WAIT_SELECTION = "wait-selection";
 const std::string ChallengeModule::SUCCESS = "success";