PT-2340 - Support MySQL 8.4

- Removed offensive terminology from library files and their tests
- Removed unused sandbox/prove2junit.pl
- Added option mysql_ssl to DSN and possibility to have DSN of multiple letters

sandbox/servers/8.4/my.sandbox.cnf

@@ -3,6 +3,7 @@ user     = msandbox
 password = msandbox
 port     = PORT
 socket   = /tmp/PORT/mysql_sandboxPORT.sock
+ssl-mode=PREFERRED
 
 [mysqld]
 port                       = PORT