fixed some more stupid mistakes

fixed stupid mistake (forgotten to add package to docker container ^^)

revert last commit

added compatibility for POSIX

fixed unknown parameter -en

added screen to make the base for executing commands to the minecraft server from host or other docker containers on the same virtual network

java_opts are default with aikars flags but can be overwritten if needed but from fieldtesting i strongly recommend use the default setting

fixed some dumb mistakes in restore.sh :D

addition to the last commit: added webp support for dynmap to allow usugae of dynmap with more efficient images (needs manually configured in dynmap-configuration.txt

COntainer muss fürs erste als root oder --privileged ausgeführt werden bis ich das behoben hab