In the case of a single line of configuration, where the address has
parameters, the parameters were being treated as seperate addresses.
Eg:
config_eth0="4321:0:1:2:3:4:567:89ab/64 nodad home preferred_lft 0"
Also document usage of parameters in the net example, and note that
multiple addresses on a single line cannot be mixed with parameters.
Newlines are required to seperate the addresses.
X-Gentoo-Bug: 398827
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=398827
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>