[PATCH] su: support numeric UIDs with a -n flag

[spareproject776]

Read the setpriv post from before, is adding that not more benifical.
Just quick tested util-linux version.

It allows privdropping
udhcpd - net_raw
udhcpc - net_raw,net_admin
udhcpc6 - net_raw,net_admin
ntpd - sys_time
telnetd - setuid,setgid
ftpd - setuid,setgid,(sys_chroot someone posted the homedir patch the other day)
crond - setuid,setgid

even managed to get dropbear out of it

nothing to do with actually coding but that just gifted me
an easy way to harden my current busybox setup
so many thanks who ever posted that :)
off down a seccomp cli wrapper rabbit hole now 

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