[configs/alternative] zshrc: remove cat()

As sometimes its behaviour may be odd or unexpected
[configs/alternative] Add incron
[configs] final commit of 'releng' - removed

As I actually never use this configuration and I'm lazy to keep it updated - removed
[configs/alternative] cpugraph-5.rc: fix background color

Should be done in 2a2695a960464cf0d9bc5fd889c43c85b4f58407
[configs/alternative] cmus: configuration fixup