build errors on Fedora 24 and CentOS 7

[Lukas Pirl]

On 10/09/2016 11:15 PM, Brian Warner wrote as excerpted:
> Thanks.. could you check that those two slaves have "127.0.0.1" bound to
> the loopback interface? One of the failing tests suggests that they do
> not, and I think the other tests depend upon being able to use 127.0.0.1
> to connect to themselves.

They do

[tahoe at tahoe-buildbot-centos7 root]$ ip addr show lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host

[root at tahoe-buildbot-centos7 ~]# ping 127.0.0.1
PING 127.0.0.1 (127.0.0.1) 56(84) bytes of data.
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.098 ms

The iptables are completely empty.
As mentioned before, all slaves run as a LXC container but that usually
does not affect connections to 127.0.0.1.

As the user running the buildslave, if I run `python -m
SimpleHTTPServer`, I can access it vie 127.0.0.1.

Any more ideas?

Cheers,

Lukas