MDEV-17926 FederatedX TODO is obsolete

storage/federatedx/TODO

-Features
-
-* Add Pushdown conditions
-* Add other network driver interfaces
-* Handle large result sets
-* Auto-discovery of tables on foreign data sources
-
-Bugs (http://bugs.mysql.com)
-
-20026 2006-05-23 FEDERATED lacks support for auto_increment_increment and auto_increment_offset   
-20724 2006-06-27 FEDERATED does not honour SET INSERT_ID    
-28269 2007-05-06 Any FEDERATED engine fails to quote reserved words for field names
-25509 2007-01-10 Federated: Failure with non-ASCII characters   
-26697 2007-02-27 Every query to a federated table results in a full scan of MyISAM table.
-21360 2006-07-31 Microsoft Windows (Windows/Linux) mysqldump error on federated tables    
-34189 2008-01-31 Any ALTER TABLE t1 ENGINE=FEDERATED CONNECTION='connectionString' on MyISAM fails    
-31757 2007-10-22 Any Federated tables break replication  Antony Curtis
-33953 2008-01-21 Any mysqld dies on search federated table using nullable index with < or <= operator
-34015 2008-01-23 Linux Problems with float fields using federated tables
-21583 2006-08-11 Linux (Linux) Federated table returns broken strings.    
-33702 2008-01-05 Accessing a federated table with a non existing server returns random error code   
-25512 2007-01-10 Federated: CREATE failures   
-32426 2007-11-16 Any FEDERATED query returns corrupt results for ORDER BY on a TEXT field 
-25510 2007-01-10 Federated: double trigger activation   
-33250 2007-12-14 SELECT * FROM really_big_federated_table eats lots of virtual memory (OOM)   
-14874 2005-11-11 Error 2013: Lost connection to MySQL server with Federated table   
-25508 2007-01-10 Federated: Failure to Remove Partitioning    
-27180 2007-03-15 #1030 - Got error 1 from storage engine with big tables
-33947 2008-01-20 Any Join on Federated tables with Unique index and IS NOT NULL crashes server
-30051 (fixed) CREATE TABLE does not connect and check existence of remote table

storage/myisam/TODO

-TODO:
-
-- Let packisam find the optimal way to store keys.
-- kill when using 'myisamchk' should remove all temporary files.
-- Text search index
-  (Sergei A. Golub is working on this)
-- Add '%' packed to myisamchk for compressed tables with blobs.

vio/docs/TODO

-* Consistent error handling. May be the initialization should
-  be taken out of constructors and be put into virtual method open().
-* The open() method is named very misleadingly().