Move code in several net/event classes to cpp to hide platform details

Move DNSLookupSync to dns.h/cpp
Move platform-specific functionality of ksm to ksm.cpp

zone/map.cpp

@@ -17,7 +17,7 @@
 */
 #include "common/compression.h"
 #include "common/file.h"
-#include "common/memory/ksm.hpp"
+#include "common/memory/ksm.h"
 #include "common/misc_functions.h"
 #include "zone/client.h"
 #include "zone/map.h"

zone/raycast_mesh.cpp

@@ -18,7 +18,7 @@
 #include "raycast_mesh.h"
 
 #include "common/eqemu_logsys.h"
-#include "common/memory/ksm.hpp"
+#include "common/memory/ksm.h"
 
 #include <cassert>
 #include <cmath>