Fix to MXS-35: https://mariadb.atlassian.net/browse/MXS-35

The parent process now correctly returns the value from the child process.

server/include/gw.h

@@ -74,7 +74,7 @@
 
 #include "dcb.h"
 
-void gw_daemonize(void);
+bool gw_daemonize(void);
 int  do_read_dcb(DCB *dcb);
 void MySQLListener(int epfd, char *config_bind);
 int  MySQLAccept(DCB *listener);