rsync is compiled without IPv6 support

Package Information

• Package name: rsync
• Package version: rsync-3.3.0-r0
• Alpine version: 3.21.0
• Alpine architecture: x86_64

Summary

rsync appears to be compiled without IPv6 support. Even when used with ssh, it tries to force it to use IPv4 only, which makes it unusable on networks without IPv6.

This was noticed because a deployment from a CI on an IPv6 only network of containers failed. ssh alone can talk to the other container, but rsync fails.

Steps to reproduce

In a docker --rm -t -i alpine:latest:

$ apk add rsync
[…]
$ rsync --version | grep IPv6
    hardlink-symlinks, no IPv6, atimes, batchfiles, inplace, append, ACLs,