core/busybox: let's re-add /etc/inittab support While busybox has weird /etc/inittab support the predefined actions without it are too minimalistic so re-add the support for it but don't install an /etc/inittab file. The file /etc/inittab file is still installed with sysvinit but if someone wants to use busybox's init it should create its own /etc/inittab file with the busybox syntax and do not install sysvinit afterwards.

# Build directory used in lots of documentation.
^build

# Qt Creator creates CMakeLists.txt.user.
^CMakeLists\.txt\.user$

# vim/emacs specific.
^tags$
^tags.lock$
^tags.temp$
\.swp$
\.swo$

# macOS specific.
\.DS_Store$

# distfiles
\.tar\..?z.?$
\.t.?z.?$
\.zip$