PT-2340 - Support MySQL 8.4

- Tests for the minimal SSL support
- Updated util/update-modules, so they don't skip tools with modules, not defined in lib

bin/pt-index-usage

@@ -7308,6 +7308,12 @@ type: string
 
 Ignore tables whose names match the Perl regex.
 
+=item --mysql_ssl
+
+short form: -s; type: int
+
+Create SSL MySQL connection.
+
 =item --password
 
 short form: -p; type: string