* add sendfile method for streamsocket
* add mswsock.lib to the project files and templates
* remove /DPOCO_NO_AUTOMATIC_LIBS for cmake windows build
* merge from upstream
* merge from upstream
* fix code stile
add NotImplemented exception for unsupported platforms
exculude <sys/sendfile.h> for POCO_EMSCRIPTEN, because https://
github.com/emscripten-core/emscripten/pull/16234
* add iostream include for std::cout
* fix compilation for emscripten (wrap sendfile)