I cannot find HAVE_LOCALE_H in config.h, and gnome-keyring already includes locale.h unconditionally. Can we simply remove the checks? Both locale.h and setlocale are in the standard C.

If setlocale is not called before using gettext, running 'gnome-keyring-daemon --help' on FreeBSD with zh_TW.UTF-8 will show broken help messages:

??? 
  gnome-keyring-daemon [???] - The Gnome Keyring Daemon

?????
  -h, --help                              ???????

???????
  -s, --start                             Start a dameon or initialize an already running daemon.
  -r, --replace                           Replace the daemon for this desktop login environment.
  -f, --foreground                        Run in the foreground
  -d, --daemonize                         Run as a daemon
  -l, --login                             Run by PAM for a user login. Read login password from stdin
  --unlock                                Prompt for login keyring password, or read from stdin
  -c, --components=pkcs11,secrets,ssh     The optional components to run
  -C, --control-directory                 The directory for sockets and control data
  -V, --version                           Show the version number and exit.