Added a little check on server type and chosen language.
Added a little check on server type and chosen language.

If a user specifies for instance language xquery, but connects to a server
that identifies itself as mil server, a warning is issued.

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