README: add DBF link; we're not DB-exclusive

# hafas-m - Commandline Public Transit Departure Monitor

**hafas-m** is a commandline client and Perl module for HAFAS public transit

departure interfaces, with a focus on the one operated by Deutsche Bahn.

See the [Travel::Status::DE::HAFAS

departure interfaces. It supports a variety of transit services in Europe and

parts of North America, with a special focus on the ones operated by

Deutsche Bahn (DB) and Österreichische Bundesbahnen (ÖBB).

This README documents installation of hafas-m and the associated

Travel::Status::DE::HAFAS Perl module.  See the [Travel::Status::DE::HAFAS

homepage](https://finalrewind.org/projects/Travel-Status-DE-DeutscheBahn) and

[hafas-m manual](https://man.finalrewind.org/1/hafas-m) for details.

[hafas-m manual](https://man.finalrewind.org/1/hafas-m) for a feature overview

and usage instructions. A web frontend to Travel::Status::DE::HAFAS is

available at [dbf.finalrewind.org](https://dbf.finalrewind.org/?hafas=DB).

## Installation

```

If you run this as root, it will install script and module to `/usr/local` by

default.

default. There is no well-defined uninstallation procedure.

### Installation from Source

sudo ./Build install

```

Note that system-wide installation does not have a well-defined uninstallation

procedure.

If you do not have superuser rights or do not want to perform a system-wide

installation, you may leave out `Build install` and use **hafas-m** from the

current working directory.