Log Message:
geography/libgeotiff: Update to 1.5.1

Not mentoined in upstream NEWS: shlib major change (ABI break)

libgeotiff 1.5.1
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* re-add #define SetCSVFilenameHook gtSetCSVFilenameHook for compatibility with \ 
GDAL 2.4.x

libgeotiff 1.5.0
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* Require PROJ >= 6 dependency
* Remove all CSV files used by geo_normalize API, since libgeotiff now relies
  on PROJ database for EPSG CRS definitions.
* geo_normalize.c: SetGTParmIds(): use ProjStraightVertPoleLongGeoKey for \ 
CT_PolarStereographic
* geo_normalize.c: report StdParallel1 for Mercator_2SP when a PCS code is used
* geo_normalize.c: fix support for Laborde Oblique Mercator
* listgeo: use PROJ database to display non-hardcoded values of a number of keys