Added -k option to kill an existing wineserver.

diff --git a/server/request.h b/server/request.h
index deadd77..0c744b4 100644
--- a/server/request.h
+++ b/server/request.h
@@ -60,6 +60,7 @@
 extern void close_master_socket(void);
 extern void lock_master_socket( int locked );
 extern int wait_for_lock(void);
+extern int kill_lock_owner( int sig );
 
 extern void trace_request(void);
 extern void trace_reply( enum request req, const union generic_reply *reply );