fdmove 1 user commands nosh
fdmove move/copy a file descriptor then chain
`fdmove` --copy to from next-prog

## Description

`fdmove` is a chain-loading utility that duplicates the (open) file descriptor from to the descriptor to, closes from unless the --copy command line option is used, and then chain loads to next-prog with the execvp 3 function.

next-prog may contain its own command line options, which `fdmove` will ignore.

## Author

Jonathan de Boyne Pollard