Description of problem:
after upgrade from fedora 25 to 26 I got the warning
/usr/sbin/clamav-notify-servers: Zeile 72: Warnung: command substitution: ignored null byte in input
everytime freshclam-sleep is called (from package clamav-update).

Version-Release number of selected component (if applicable):
0.99.2

How reproducible:
always if clamav-update is called via cron

Steps to Reproduce:
1.
2.
3.

Actual results:
warnings - but update is called without any problem

Expected results:
no warning

Additional info:
according to web search this is due to changes in bash interpreter for null byte characters in scripts. Thsi is done in line 72 by sending "zRELOAD\0" to the clamav server clamd. using "nRELOAD\n" does the same without warning.