in the pruning step. If you select a key using B<-u> it has to be in
this list. B<REQUIRED>.
+=back
+
=head2 General settings
+=over
+
=item B<caffhome> [string]
Base directory for the files caff stores. Default: B<$HOME/.caff/>.
+=back
+
=head2 GnuPG settings
+=over
+
=item B<gpg> [string]
Path to the GnuPG binary. Default: B<gpg>.
Additional commands to pass to gpg after the "sign" command.
Default: none.
+=back
+
=head2 Keyserver settings
+=over
+
=item B<keyserver> [string]
Keyserver to download keys from. Default: B<subkeys.pgp.net>.
A list of files containing keys to be imported.
+=back
+
=head2 Signing settings
+=over
+
=item B<no-sign> [boolean]
If true, then skip the signing step. Default: B<0>.
Select the key that is used for signing, in case you have more than one key.
With multiple keyids, sign with each key in turn.
+=back
+
=head2 Mail settings
+=over
+
=item B<mail> [boolean]
Whether to send mails. This is a quad-option, with which you can set the