Modified some file names.

src/dhcp.cpp

@@ -24,7 +24,6 @@
 #include "endianness.h"
 #include "dhcp.h"
 #include "ethernetII.h"
-#include "ipaddress.h"
 
 using std::string;
 using std::list;

src/dns.cpp

@@ -24,7 +24,7 @@
 #include <cassert>
 #include <memory>
 #include "dns.h"
-#include "ipaddress.h"
+#include "ip_address.h"
 
 using std::string;
 using std::list;

src/ip_address.cpp

@@ -21,7 +21,7 @@
 
 #include <stdexcept>
 #include <sstream>
-#include "ipaddress.h"
+#include "ip_address.h"
 #include "endianness.h"
 
 using std::string;