Description of problem:
The haproxy service fails after upgrade from f27 to f28 with the following error message:
[ALERT] 138/111831 (9623) : Starting frontend GLOBAL: error when trying to preserve previous UNIX socket [/var/lib/haproxy/stats]

Version-Release number of selected component (if applicable):
haproxy-1.8.8-1.fc28

How reproducible:
Always

Steps to Reproduce:
1. Enable haproxy.service on f27
2. Upgrade to f28
3.

Actual results:
The haproxy service fails to start.

Expected results:
The haproxy service is able to run.

Additional info:
I tried reinstalling haproxy and starting it with the default haproxy.cfg but it did not help.
Removing /var/lib/haproxy/stats does not help, just gives the following error:
[ALERT] 138/175716 (30194) : Starting frontend GLOBAL: cannot bind UNIX socket [/var/lib/haproxy/stats]

ls -l /var/lib/haproxy/stats
srwxr-xr-x. 1 root root 0 10 maj 21.50 /var/lib/haproxy/stats