[pgpool-committers: 10492] pgpool: Allow pcp clients to connect to IPv6 addresses.

[Tatsuo Ishii]

Allow pcp clients to connect to IPv6 addresses.

We have already allowed pcp server to connect to IPv6 addresses, but
pcp clients were not allowed to connect to them until today. This
commit allows pcp clients to connect to IPv6 addresses.

Discussion: [pgpool-general: 9481] Does pgpool 4.6.0 support pure ipv6 configuration?
https://www.pgpool.net/pipermail/pgpool-general/2025-May/009484.html
Backpatch-through: v4.6

Branch
------
master

Details
-------
https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=4e3d6cc84a0124af925f79a36de3814daa1d6129

Modified Files
--------------
src/libs/pcp/pcp.c | 87 ++++++++++++++++++++++++++++++++++++------------------
1 file changed, 58 insertions(+), 29 deletions(-)