This script is a wrapper around gpgconf to run it with the
command --apply-defaults for all real users with an existing
GnuPG home directory.  Admins might want to use this script to update he
GnuPG configuration files for all users after
/etc/gnupg/gpgconf.conf has been changed.  This allows to enforce
certain policies for all users.  Note, that this is not a bulletproof of
forcing a user to use certain options.  A user may always directly edit
the configuration files and bypass gpgconf.
applygnupgdefaults is invoked by root as:
applygnupgdefaults