Johan Wikman 34dd8a52bb MXS-1475 Allow the setting on N vars with one stmt
With this change, the following will be possible.

SET @maxscale.cache.populate=false, @maxscale.cache.use=true;
2018-03-16 14:34:04 +02:00
..
2018-03-16 14:34:04 +02:00