Create a script that fixes permissions and autostart and stuff on existing installations

[AlCalzone]

As discussed with @Apollon77 we should create a script that fixes existing installations to a certain degree or brings them up to par with the installations our new installer creates. Let's call it fixmyshit.sh 😆

It should do the following:

• fix permission errors in /opt/iobroker
• set the permissions like the installer does (with default ACL)
• create a user iobroker
• setup autostart with systemd and run iobroker under the iobroker user
• add permissions for nodejs to access bluetooth, gpio and other ports so we don't need to run adapters with root permissions
• handle migration from init.d to systemd
• Install sudo if it is not installed
• Add user iobroker to the sudoers

Did I forget something?

[Apollon77]

We should also have this as a "shell script loaded from github" script so that we have better control over it.

Maybe: handle migration from init.d script to systemd somehow?

[AlCalzone]

Should be just like the linux installer, so curl | bash from github.

[Apollon77]

correct