MDEV-22981: Bad "default-character-set" option in [client] option group...

MDEV-22981: Bad "default-character-set" option in [client] option group 50-client.cnf on Debian/Ubuntu

Remove unsuported parameter by some clients.

debian/additions/mariadb.conf.d/50-client.cnf

@@ -5,7 +5,7 @@
 
 [client]
 # Default is Latin1, if you need UTF-8 set this (also in server section)
-default-character-set = utf8mb4
+# default-character-set = utf8mb4
 
 # Example of client certificate usage
 # ssl-cert=/etc/mysql/client-cert.pem