Redox Support

[AldaronLau]

Redox can be supported by reading paths on the system, rather than use unsafe relibc unix-like APIs. Unsure about language support (probably check same unix environment variables) and no "fancy device name" is implemented in Redox as far as I can tell.

/etc/redox-release
    Redox version followed by newline

/etc/passwd
    Effective Versions:
         https://docs.rs/redox_syscall/latest/syscall/call/fn.geteuid.html
         https://docs.rs/redox_syscall/latest/syscall/call/fn.getegid.html
    Username;Uid;Gid;FullName,*;…
    root;0;0;root;file:/root;file:/bin/ion
    jeron::1000:1000:Jeron Lau:/var/home/jeron:/bin/bash

sys:uname
    Kernel Name
    
    Kernel Release
    
    Machine Architecture