events server can also run on random port
events server can also run on random port

With this last change, it is now possible to run more than one user
agent on same pc without docker. With a fixed one it would raise port
already in use and it is not configurable, making it impossible to run
multiple activist UA.

kaeff/pixelated-user-agent,torquemad/pixelated-user-agent,alabeduarte/pixelated-user-agent,alabeduarte/pixelated-user-agent,pixelated/pixelated-user-agent,phazel/pixelated-user-agent,kaeff/pixelated-user-agent,phazel/pixelated-user-agent,sw00/pixelated-user-agent,torquemad/pixelated-user-agent,alabeduarte/pixelated-user-agent,sw00/pixelated-user-agent,kaeff/pixelated-user-agent,torquemad/pixelated-user-agent,phazel/pixelated-user-agent,pixelated-project/pixelated-user-agent,SamuelToh/pixelated-user-agent,PuZZleDucK/pixelated-user-agent,sw00/pixelated-user-agent,PuZZleDucK/pixelated-user-agent,pixelated-project/pixelated-user-agent,phazel/pixelated-user-agent,pixelated/pixelated-user-agent,alabeduarte/pixelated-user-agent,pixelated/pixelated-user-agent,SamuelToh/pixelated-user-agent,pixelated/pixelated-user-agent,SamuelToh/pixelated-user-agent,torquemad/pixelated-user-agent,rdoh/pixelated-user-agent,pixelated-project/pixelated-user-agent,kaeff/pixelated-user-agent,pixelated-project/pixelated-user-agent,kaeff/pixelated-user-agent,SamuelToh/pixelated-user-agent,torquemad/pixelated-user-agent,rdoh/pixelated-user-agent,sw00/pixelated-user-agent,pixelated/pixelated-user-agent,rdoh/pixelated-user-agent,sw00/pixelated-user-agent,pixelated-project/pixelated-user-agent,PuZZleDucK/pixelated-user-agent,rdoh/pixelated-user-agent,phazel/pixelated-user-agent,SamuelToh/pixelated-user-agent,rdoh/pixelated-user-agent,PuZZleDucK/pixelated-user-agent,PuZZleDucK/pixelated-user-agent,alabeduarte/pixelated-user-agent