Wow, this was a good one eh?
check out the help.
[root@esx1 root]# esxcfg-init -h
This program is used to initialize device names and advanced configuration options for the VMkernel on system boot.It is NOT intended for use outside of initialization scripts.
I decided to google the command to see if anyone had insight. Not much more than what I give here. The help command then nothing. So for real I might get 2 blog posts in one day since this is so short.