ClamAV Docker health check always fail in Docker Engine 26.0.0+

[sammyhk]

As title, ClamAV Docker health check always fail in Docker Engine 26.0.0+ due to Docker Engine since 26.0.0 enabled IPv6 on loopback address (https://docs.docker.com/engine/release-notes/26.0/#bug-fixes-and-enhancements-2)

Always attempt to enable IPv6 on a container's loopback interface, and only include IPv6 in /etc/hosts if successful. moby/moby#47062

Which caused localhost resolved as IPv6 [::1] address and nc command in busybox fail to handle IPv6 address, causing the health check always fail:

clamav-docker/clamav/1.3/alpine/scripts/clamdcheck.sh

Line 6 in 5eb477e

if [ "$(echo "PING" | nc localhost 3310)" != "PONG" ]; then

[sammyhk]

Suggest to fix by hard-coding the the loopback IPv4 address 127.0.0.1 instead of using localhost.