databases/mysql80-{client, server}: Update to 8,0.43HEADmain

Bugs Fixed

    Important Note; Group Replication: The Group Communication System
(GCS) handles Group Replication communication between members, and keeps
track of the group membership and connections between all group members.
Membership tracking includes the membership's current and previous two
iterations. When a member leaves, the remaining members in the group
keep a record of the departing member but stop communicating with it
until it returns. For example: The group contains members M1, M2, and
M3. M3 leaves the group; M1 and M2 stop communicating with M3. When a
new member (M4) joins, it learns the previous iterations of this group's
membership and attempts to communicate with all servers, including those
from previous iterations (in this case, M3).

    In the event that some previous servers were gone and did not
return, the new member continuously tried to connect to the missing
servers; in some conditions, these ongoing connection attempts could
introduce network latency affecting group member communication.

    In order to avoid this issue, connections to servers that belong to
iterations of the group membership are now stopped after 5 minutes,
which should be sufficient time to re-establish valid connections
without imposing a continuing impact on group communication. (Bug

    NDB Cluster: Following an upgrade from NDB 8.0 to NDB 8.4, all data
nodes in the cluster underwent an unexpected simultaneous restart. This
occurred when the transaction coordinator had no scan state, leading to
protocol timeout; the resulting misalignement in protocol states caused
data nodes to shut down unexpectedly. This is fixed by extending
existing handling of an unexpected SCAN_NEXTREQ signal to cover the case
when the scan is already stateless. (Bug #37994985)

    References: This issue is a regression of: Bug #37022901.

Full Changelog see:
https://dev.mysql.com/doc/relnotes/mysql/8.0/en/news-8-0-43.html

PR:	288952
Sponsored by:	Netzkommune GmbH

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