Added description of new rwsplit variables, read_ses_variables_from_slaves and write_ses_variables_to_all to Configuration document.
Added description of new rwsplit variables, read_ses_variables_from_slaves and write_ses_variables_to_all to MaxScale_template.cnf
readwritesplit.h:Set default values for write_ses_variables_to_all=true, and read_ses_variables_from_slaves=false
Added example of new parameters, read_ses_variables_from_slaves and write_ses_variables_to_all to MaxScale_template.cnf