Small suggestion for IPv6 page

[Paul Hoffman]

Greetings again. As always, thanks for the very clear documentation.

handbook/network-ipv6.html does not say how to create aliases for IPv6 
addresses. I guessed:
    ifconfig_em1_ipv6_alias0="inet6 fd00::21:1:101/112"
This was wrong. The following works:
    ifconfig_em1_alias0_ipv6="inet6 fd00::21:1:101/112"

An example on handbook/network-ipv6.html would have prevented me from 
having to guess (and guess wrong, in my case).

--Paul Hoffman