nixos/networking: don't add extra names to ::1

From hosts(5):

> For each host a single line should be present with the following
> information:
>
>               IP_address canonical_hostname [aliases...]

With lines like "::1 localhost ahost.adomin ahost", we were saying
that the canonical name for "ahost" was "localhost", the opposite of a
canonical name.  This is why a second loopback address (127.0.0.2) is
used for hostnames with IPv4 — if they were put after "localhost" on
the 127.0.0.1 line, the same thing would happen.  With IPv6 we can't
do the same thing as there's only a single loopback address, so
instead the right thing to do is to simply not list the hostnames in
/etc/hosts, and rely on the myhostname NSS plugin, which will handle
this correctly.

(Note that the examples in hosts(5) also do not include IPv6 FQDN or
hostname entries.)

0 files changed, 0 insertions, 0 deletions