mclient: warn when -t is used without xquery language
mclient: warn when -t is used without xquery language

the option -t is ignored for non-XQuery languages, unify warning
messages, since the client continues, don't mention the process name.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb