Log Message:
The 1.9.2 release is a bug fix release.
* Fix infinite GDALOpen recursion with some VRTs (4835)
* Avoid destroying existing overviews (.aux/.rrd) (4831)
* Support recognising NaN better in CPLStrtod() (4799)
* Fix windows declaration for CPLGetErrorHandlerUserData() (4755)
* Fix compilation with Gentoo modified zlib 1.2.6 (4723)
* Look for libgeotiff headers in /usr/include/libgeotiff too (4706)
* Improve warning handling in CPLClearRecodeStubWarningFlags() (4650)
* Fix Solaris compilation bug (4705)
* MorphFromESRI(): compare SPHEROID/PRIMEM parms, not names (4673)
* Avoid iffy casting of OGRWkbGeometryType to int (4847)
* Fix thread safety issue with CPLOpenShared()