efa-m documentation updates, add previously undocumented -L option

=head1 SYNOPSIS

B<efa-m> [B<-d> I<date>] [B<-t> I<time>] I<city> [I<type>B<:>]I<name>

B<efa-m> [B<-Lr>] [B<-d> I<dd.mm.yyyy>] [B<-t> I<hh:mm>]

[B<-l> I<lines>] [B<-p> I<platforms>] [B<-u> I<url>]

I<city> [I<type>B<:>]I<name>

=head1 VERSION

=item B<-d>, B<--date> I<dd.mm.yyyy>

Show departures for I<date> instead of today

Show departures for I<date> instead of today.

May also be specified as I<dd.mm.>

=item B<-L>, B<--linelist>

Do not show departures. Instead, list all lines serving the specified place.

Note that this information may be incomplete -- only lines which are in

service either at the time of the B<efa-m> call or at the time specifed

using B<--date> and B<--time> are guaranteed to be included.

=item B<-l>, B<--line> I<lines>

=head1 EXIT STATUS

Zero.

Normally zero. B<1> means B<efa-m> was called with invalid options,

B<2> indicates a request error from Travel::Status::DE::EFA(3pm).

=head1 CONFIGURATION

=item * LWP::UserAgent(3pm)

=item * Travel::Status::DE::EFA(3pm)

=item * XML::LibXML(3pm)

=back

=head1 BUGS AND LIMITATIONS

Unknown.

B<efa-m> uses the VRR EFA service by default, which seems to contain the

greatest available set of information. However, some cities (e.g. Berlin

or parts of Hamburg) are incomplete. B<efa-m> is not yet able to choose the

appropriate EFA URL for these by itself, it needs to be done manually with

the B<-u>, B<--efa-url> option.

=head1 AUTHOR