DB HAFAS is no more; service is now a mandatory argument

bin/hafas

@@ -81,6 +81,18 @@ if ($list_services) {
 	exit 0;
 }
 
+if ( not $service ) {
+	say STDERR 'Note: You have called hafas without specifying a service.';
+	say STDERR q{};
+	say STDERR 'Unfortunately, the previous default service (DB HAFAS)';
+	say STDERR 'is no more, and there is no generic replacement available.';
+	say STDERR q{};
+	say STDERR 'Please use "hafas --list" to list supported services,';
+	say STDERR 'and then select one via -s <service>.';
+	say STDERR 'Falling back to ÖBB for now.';
+	$service = 'ÖBB';
+}
+
 parse_mot_options();
 
 my ( $from_stop, @via_stops ) = @ARGV;

lib/Travel/Routing/DE/HAFAS.pm

@@ -46,7 +46,7 @@ sub new {
 	}
 
 	if ( not defined $service ) {
-		$service = $conf{service} = 'DB';
+		confess("The service option is mandatory");
 	}
 
 	if ( defined $service and not exists $hafas_instance{$service} ) {
@@ -639,9 +639,9 @@ Request connections with scheduled changeover durations of at least I<minutes>.
 Note that this does not account for real-time data: the backend may return
 delayed connections that violate the specified changeover duration.
 
-=item B<service> => I<service>
+=item B<service> => I<service> (mandatory)
 
-Request results from I<service>, defaults to "DB".
+Request results from I<service>.
 See B<get_services> (and C<< hafas-m --list >>) for a list of supported
 services.