WebP doc: update URL and mention maximum image size (#5411)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27021 f0d54148-0727-0410-94bb-9a71ac55c965
LIBKML: remove @ character from style name in style tables (they are reserved in feature style string); add extensive tests for reading and writing styles

git-svn-id: https://svn.osgeo.org/gdal/trunk@27022 f0d54148-0727-0410-94bb-9a71ac55c965
LIBKML: add support for creating StyleMap (ATC 36, 68)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27023 f0d54148-0727-0410-94bb-9a71ac55c965
KMLSUPEROVERLAY: add NAME and DESCRIPTION creation options; read them back as metadata

git-svn-id: https://svn.osgeo.org/gdal/trunk@27024 f0d54148-0727-0410-94bb-9a71ac55c965
KMLSUPEROVERLAY: add ALTITUDE and ALTITUDEMODE creation options (ATC 33)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27025 f0d54148-0727-0410-94bb-9a71ac55c965
PDF writing: automatically adjust DPI in case the page dimension exceeds the 14400 maximum value (in user units) allowed by Acrobat (#5412)

git-svn-id: https://svn.osgeo.org/gdal/trunk@27026 f0d54148-0727-0410-94bb-9a71ac55c965
Merge remote-tracking branch 'upstream/trunk' into trunk
switch to a struct for processing viewshed lines