server: add read configuration file function

Change-Id: I6a3fe8208219a18e0a67b791dedb6b93d5e9caab
diff --git a/ndn-handle/delete-handle.cpp b/ndn-handle/delete-handle.cpp
index 8e1130c..ba9619b 100644
--- a/ndn-handle/delete-handle.cpp
+++ b/ndn-handle/delete-handle.cpp
@@ -88,7 +88,7 @@
 void
 DeleteHandle::listen(const Name& prefix)
 {
-  getFace().setInterestFilter(prefix,
+  getFace().setInterestFilter(Name(prefix).append("delete"),
                               bind(&DeleteHandle::onInterest, this, _1, _2),
                               bind(&DeleteHandle::onRegisterFailed, this, _1, _2));
 }