[Backport 6.2] PROJStringParser::createFromPROJString(): avoid potential infinite recursion (fixes #1574) #1594
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…cursion (fixes #1574) The exact circumstances are a bit difficult to explain, but they involve using a non-default context, enabling proj_context_use_proj4_init_rules() on it, using proj_create(ctxt, "+init=epsg:XXXX +type=crs"), whereas PROJ_LIB is defined to a directory that has a 'epsg' file in it.
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Backport #1589.