Revert "- creates proper ifc.h and dhcp.h headers for libnetutils"

This reverts commit c88e09cb98fb3690c3cf49f5a825532e0d9bf300.
diff --git a/nexus/DhcpClient.cpp b/nexus/DhcpClient.cpp
index 713059d..a5654d2 100644
--- a/nexus/DhcpClient.cpp
+++ b/nexus/DhcpClient.cpp
@@ -27,15 +27,35 @@
 
 #include <sysutils/ServiceManager.h>
 
-#include <netutils/ifc.h>
-#include <netutils/dhcp.h>
-
 #include "DhcpClient.h"
 #include "DhcpState.h"
 #include "DhcpListener.h"
 #include "IDhcpEventHandlers.h"
 #include "Controller.h"
 
+extern "C" {
+int ifc_disable(const char *ifname);
+int ifc_add_host_route(const char *ifname, uint32_t addr);
+int ifc_remove_host_routes(const char *ifname);
+int ifc_set_default_route(const char *ifname, uint32_t gateway);
+int ifc_get_default_route(const char *ifname);
+int ifc_remove_default_route(const char *ifname);
+int ifc_reset_connections(const char *ifname);
+int ifc_configure(const char *ifname, in_addr_t ipaddr, in_addr_t netmask, in_addr_t gateway, in_addr_t dns1, in_addr_t dns2);
+
+int dhcp_do_request(const char *ifname,
+                    in_addr_t *ipaddr,
+                    in_addr_t *gateway,
+                    in_addr_t *mask,
+                    in_addr_t *dns1,
+                    in_addr_t *dns2,
+                    in_addr_t *server,
+                    uint32_t  *lease);
+int dhcp_stop(const char *ifname);
+int dhcp_release_lease(const char *ifname);
+char *dhcp_get_errmsg();
+}
+
 DhcpClient::DhcpClient(IDhcpEventHandlers *handlers) :
             mState(DhcpState::INIT), mHandlers(handlers) {
     mServiceManager = new ServiceManager();