procd: create /dev/fd symlink
This is needed for ksh/bash style process substitution such as <(command) and >(command) which was introduced in ash as of busybox version 1.34.0 to work.
This is needed for ksh/bash style process substitution such as <(command) and >(command) which was introduced in ash as of busybox version 1.34.0 to work.