+ add link to server-config repo

* disable quotas on btrfs volumes

+ add note about installing ansible via pip3

* change vagrant to use ubuntu 20.04 but keep 18.04 version in subfolder

! disable samba_mitigate_cve_2017_7494: because this leads to win clients not able to connect

+ btrfs role can handle different tools package names in distributions

* execute backup timer only once per day

+ add bash-completion

! fix smart test scripts

+ add link to supported SMART devices and corresponding type parameters

! add git to installation step on real hardware

- remove swapfile role

+ add disk-monitoring role

- remove TODO for btrfs quotas -> will not fix

+ make profile settings in btrfs role more flexible