0014192 timesync: ignore IPv6 addresses when the kernel does not support IPv6

1 file Authored by Yu Watanabe a year ago, Committed by zbyszek a year ago,
    timesync: ignore IPv6 addresses when the kernel does not support IPv6
    
    Fixes #25728.
    
    (cherry picked from commit 713e6e631d4071c7d9287d5d343bebb69a58b29c)