server-tools/instance-manager/commands.cc:
  fix memory leak
server-tools/instance-manager/guardian.cc:
  don't check pthread_mutex_lock/unlock return value, as it never returns error if properly
  used (no self deadlocks) and initialized
server-tools/instance-manager/guardian.h:
  prototype fixed
server-tools/instance-manager/instance_map.cc:
  don't check pthread_mutex_lock/unlock status, as it never returns error if
  properly used (no self deadlocks) and initialized
server-tools/instance-manager/instance_map.h:
  prototype fixed
server-tools/instance-manager/listener.cc:
  initialize highest-numbered descriptor to 0 for select before setting it with max(n, sockets[i]),
  ifdef unix-specific code
server-tools/instance-manager/manager.cc:
  remove commented stuff
server-tools/instance-manager/options.cc:
  fix crash in load_defaults, which happened on all Unix systems due to
  const char *Options::config_file= NULL. Check return value for GetModuleFileName.
  Get rid of obscure default_config_file[FN_REFLEN]= "/etc/my.cnf"; which was never used