A commit was made to the fping repository which has changed the help output from the fping command, specifically, the way that the options for source IP are displayed. Previously, the short options would be followed by a space; now they're followed by a comma.

The Zabbix fping feature detection code in the function `get_source_ip_option` of `icmpping.c` searches the fping help output for the short option followed by a space, and thus no longer detects the source IP option (as it's now followed by a comma)

This causes some ICMP checks to fail on systems with multiple interfaces.