Bug#577445: Addition version information

[Sebastiaan Couwenberg]

Control: found -1 gdal/1.6.3-2
Control: found -1 gdal/1.6.3-3
Control: found -1 gdal/1.6.3-4
Control: found -1 gdal/1.7.1-1
Control: found -1 gdal/1.7.2-1
Control: found -1 gdal/1.7.2-2
Control: fixed -1 gdal/1.7.3-1

Some analysis of the libgdal-doc versions available on
snapshot.debian.org shows that this issue was fixed much earlier.

Regards,

Bas

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