Rollup merge of #74271 - lzutao:cmdbytes, r=LukasKalbertodt
Rollup merge of #74271 - lzutao:cmdbytes, r=LukasKalbertodt

process_unix: prefer i32::*_be_bytes over manually shifting bytes

This PR makes it more clear about the intend of the code.

graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust