provides iwhois command to use CNAMES under whois.geek.nz to find most accurate whois server
This is already done in lib/theme-and-appearance.zsh and supports Darwin/BSD/etc
Fix dud alias. Switch --max-depth for just -d

As far as I can tell (tested on Linux & Darwin, BSD man page seems to agree), `-d` is pretty univerally accepted as the depth argument.  So instead of doing a test, we can just use -d and call it a day.