Validate the client address

Address could be hostname or IPaddress,Address validation
is being done by calling the gethostbyname system function.

Change-Id: I7d7eecd164c471c80af0b440a4b541badd2f966f
Signed-off-by: Ratan Gupta <ratagupt@in.ibm.com>
diff --git a/Makefile.am b/Makefile.am
index 68c7ab7..015a558 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -16,6 +16,7 @@
 		snmp_main.cpp \
 		snmp_conf_manager.cpp \
 		snmp_client.cpp \
+		snmp_util.cpp \
 		xyz/openbmc_project/Network/Client/Create/server.cpp
 
 CLEANFILES = \