cext: Support compression

[dveeden]

Fixes:
Bug #110879: Compression doesn't work with C extension API
https://bugs.mysql.com/bug.php?id=110879

Looks like the problem is that the C Extension parses the compress option, but doesn't set the client_flags which is passed to mysql_real_connect.

Script:

import _mysql_connector

con = _mysql_connector.MySQL()
con.connect(
    host="127.0.0.1",
    user="root",
    password="root",
    compress=True,
)

con.query("SHOW STATUS LIKE 'Compression%'")
while row := con.fetch_row():
    print(row)
con.free_result()

con.close()

Output

('Compression', 'ON')
('Compression_algorithm', 'zlib')
('Compression_level', '6')

[mysql-oca-bot]

Hi, thank you for your contribution. Please confirm this code is submitted under the terms of the OCA (Oracle's Contribution Agreement) you have previously signed by cutting and pasting the following text as a comment:
"I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it."
Thanks

[dveeden]

I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it.

[mysql-oca-bot]

Hi, thank you for your contribution. Your code has been assigned to an internal queue. Please follow
bug http://bugs.mysql.com/bug.php?id=110879 for updates.
Thanks