Log Message:
mysql57: updated to 5.7.42

Changes in MySQL 5.7.42

Functionality Added or Changed

Important Change: The linked OpenSSL library for MySQL Server has been updated \ 
to version 1.1.1t. Issues fixed in OpenSSL version 1.1.1t are described at \ 
https://www.openssl.org/news/cl111.txt.

The linked curl library for MySQL Server (Enterprise Edition) has been updated \ 
to version 7.88.1.

Bugs Fixed

InnoDB: Prevent online DDL operations from accessing out-of-bounds memory.

Replication: Some binary log events were not always handled correctly.

Replication: Setting binlog_order_commits to OFF could lead to a missed GTID in \ 
the next binary log file's Previous_gtids event.

Our thanks to Yewei Xu and the Tencent team for the contribution.

A client setting the character set to an impermissible client character set \ 
(ucs2, utf16, utf16le, or utf32) could cause unexpected behavior when the client \ 
used an authentication plugin.

The scope of the connect_timeout limit was extended to full-packet reads.

Using --single-transaction with mysqldump version 5.7.41 required either the \ 
RELOAD or FLUSH_TABLES privilege. This requirement now applies only when both \ 
gtid_mode=ON (default OFF) and with --set-gtid-purged = ON|AUTO (default AUTO).