Escape processing - allow for ConnectorJ compatible temporal escapes

MariaDB JDBC driver supports escape processing for temporal types like described in the standard :

{d 'date_string'}

,

{t 'time_string'}

, and

{ts 'timestamp_string'}

. ConnectorJ allows to omit space between d,t,ts and string, e.g

{t'10:30:29'}

is also valid in C/J.

At least one project seems to be using this Connector/J feature, and run into problems with MariaDB driver http://www.sos-berlin.com/jira/browse/JS-952