add unicode compatible file_lock for Windows

boost::interprocess::file_lock cannot open the files that contain characters which cannot be parsed by the user's code page on Windows.
This commit add a new class to handle those specific file for Windows.

src/init.cpp

@@ -51,13 +51,13 @@
 
 #ifndef WIN32
 #include <signal.h>
+#include <sys/stat.h>
 #endif
 
 #include <boost/algorithm/string/classification.hpp>
 #include <boost/algorithm/string/replace.hpp>
 #include <boost/algorithm/string/split.hpp>
 #include <boost/bind.hpp>
-#include <boost/interprocess/sync/file_lock.hpp>
 #include <boost/thread.hpp>
 #include <openssl/crypto.h>