set default visibility to unlisted

lib/Travelynx/Command/database.pm

@@ -1384,7 +1384,9 @@ my @migrations = (
 		my $res = $db->select( 'users', [ 'id', 'public_level' ] );
 		while ( my $row = $res->hash ) {
 			my $old_level = $row->{public_level};
-			my $new_level = 0;
+
+			# status default: unlisted
+			my $new_level = 30;
 			if ( $old_level & 0x01 ) {
 
 				# status: account required

lib/Travelynx/Model/Users.pm

@@ -437,7 +437,7 @@ sub add {
 		{
 			name          => $user_name,
 			status        => 0,
-			public_level  => $visibility_atoi{private},
+			public_level  => $visibility_atoi{unlisted},
 			email         => $email,
 			password      => $password,
 			registered_at => $now,