gpgconf: Add more comments.
gpgconf: Add more comments.

* src/engine-gpgconf.c (gpgconf_config_dir_cb, gpgconf_conf_dir):
Add comments.

Signed-off-by: Marcus Brinkmann <77666125932addc6fc525b281b518fd8fd2203d8@g10code.com>
GnuPG-bug-id: 3018

gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme,gpg/gpgme