The miniz is used for zlib compression. But because that library has some bugs related to a smal window sizes (we need 4096), I had to make some patches to the library. The miniz library happens to also be part of esp-idf. To distinguish between our version and the esp-idf version, I created a `namespace Miniz` around our version. But nevertheless, the esp-idf version is called when I'm calling Miniz::tdefl_init and Miniz::tdefl_compress . Why??
Anyway, renamed tdefl_init and tdefl_compress to tdefl_initOEPL and tdefl_compressOEPL to get it working. This is ugly. If somebody has a better solution, please let me know!