Synology: Host name conflict
A fresh install (latest image, latest Synology DSM, latest iOS 11) of homebridge does not work for me. The logs show this:

```
Withdrawing address record for fe80::42:4cff:fea6:2530 on docker0.
Withdrawing address record for 172.17.0.1 on docker0.
Withdrawing address record for 172.16.1.200 on eth0.
Host name conflict, retrying with homebridge-48
Registering new address record for fe80::42:4cff:fea6:2530 on docker0.*.
Registering new address record for 172.17.0.1 on docker0.IPv4.
Registering new address record for 169.254.175.241 on eth1.IPv4.
Registering new address record for 172.16.1.200 on eth0.IPv4.
```

As you can see, it's already at `-48` and this keeps going on forever.

The relevant log messages are:

```
Starting Avahi daemon
Found user 'avahi' (UID 86) and group 'avahi' (GID 86).
Successfully dropped root privileges.
avahi-daemon 0.6.32 starting up.
WARNING: No NSS support for mDNS detected, consider installing nss-mdns!
Loading service file /etc/avahi/services/sftp-ssh.service.
Loading service file /etc/avahi/services/ssh.service.
*** WARNING: Detected another IPv4 mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. ***
*** WARNING: Detected another IPv6 mDNS stack running on this host. This makes mDNS unreliable and is thus not recommended. ***
Joining mDNS multicast group on interface docker0.IPv6 with address fe80::42:4cff:fea6:2530.
New relevant interface docker0.IPv6 for mDNS.
Joining mDNS multicast group on interface docker0.IPv4 with address 172.17.0.1.
New relevant interface docker0.IPv4 for mDNS.
Joining mDNS multicast group on interface eth1.IPv4 with address 169.254.175.241.
New relevant interface eth1.IPv4 for mDNS.
Joining mDNS multicast group on interface eth0.IPv4 with address 172.16.1.200.
New relevant interface eth0.IPv4 for mDNS.
Network interface enumeration completed.
```

I have no other Docker images running on the Synology, but there is (native) Plex and a few other services. Is something else running an mDNS service that causes this?

My iOS 11 device is not able to find the homebridge. Entering the code manually just shows a loading spinner that is there forever.