CVE-2021-42384

fix (importing awk.c from busybox version >= 1.34.0 due to large
amount of changes made to the awk.c code) introduces a regression
to busybox awk in xenial and earlier. Applying changes from the
commit which prevents this regression from happening (237bedd499c)
could result in further regressions being introduced to other
applets in busybox. This happens because interfaces for applets
are altered in this commit, and the calls to get them executed
through busybox are modified. External applications which use
busybox could end up with regressions as well because of this.