Finally Unity released the next version and so I was also able to release the next version (1.21 - Performance update).

change log:
added:
- landscape tester is now part of the modding api

changes (to improve performance):
- network code
- file structure

bug fixes:
- changed auto walk keys from vf to 5/8 keypad, because f was asigned to flashlight
- fixed wrong normals of the terrain
- wrong calculation of the spawn position, when planned spawn, was in water