Mateusz Loskot eacabe5c46 [geos] Update port to latest GEOS 3.6.2
* Bump GEOS version wherever necessary
* Update download package and checksum.
* Replace download from SVN with official release source package.
* Remove generating of geos_svn_revision.h as unnecessary -
  released source package includes the header.
* Explain status of the missing CMake modules.
* Remove CMake option -DBUILD_TESTING as unused.

GEOS is important dependency of GDAL (updated in #1879;
GDAL 2.2.2 can still work with GEOS earlier than 3.6.2).
2017-09-26 22:29:24 +02:00
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