[pgpool-committers: 10411] pgpool: Fix IPv6 in heatbeat process.

[Tatsuo Ishii]

Fix IPv6 in heatbeat process.

From Pgpool-II 4.6.0, heartbeat process can handle IPv6 receiver
sockets. However, the process does not work normally if IPv6 is
disabled in the system. Like Pgpool-II main process and PostgreSQL, I
think it should work normally if IPv4 is available.

Discussion: https://www.pgpool.net/pipermail/pgpool-hackers/2025-April/004579.html
Backpatch-through: 4.6

Branch
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V4_6_STABLE

Details
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https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=5f4d2d6839f238bdf0ab99a4e08bcc1e5f95e4a3

Modified Files
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src/watchdog/wd_heartbeat.c | 35 +++++++++++++++++++++--------------
1 file changed, 21 insertions(+), 14 deletions(-)