cmake: introduce a new path prefix for temporary files (used at least for HTTP bodies
cmake: adds X0_ENABLE_O_TMPFILE compile-time config option to enable/disable O_TMPFILE support
[base] FileSource: advance the API a bit
[base] Signal: API and documentation improved. Also supports adding std::function<> objects now.
[http] HttpRequest: adds support for easy request body processing
[plugins] echo2_example: new example plugin showing off how to *easily* retrieve request bodies.
minor comment update
some new TODO item on the list