Provide an overriden tiddler_delete to deal with mysql's lack of transaction support.
Provide an overriden tiddler_delete to deal with mysql's lack of transaction support.

This is rather the hack, but is (if it works, it's hard to test) a
more immediate fix than switching over to innodb for some tables,
and because of the text table needing to stay MyISAM for fulltext
indexing, that's a complex change with several impacts.

tiddlyweb/tiddlywebplugins.mysql