//usage: "{{-n INCREMENT} | PRIORITY} [[-p | -g | -u] ID...]"
//usage:#define renice_full_usage "\n\n"
//usage: "Change scheduling priority for a running process\n"
-//usage: "\nOptions:"
//usage: "\n -n Adjust current nice value (smaller is faster)"
//usage: "\n -p Process id(s) (default)"
//usage: "\n -g Process group id(s)"