Rename ILLEGALMODE to NOLANGUAGE.  It's not so much an illegal value (it is the initial value) but it is the value that indicates that no language choice has (yet) been made.
Rename ILLEGALMODE to NOLANGUAGE.  It's not so much an illegal value
(it is the initial value) but it is the value that indicates that no
language choice has (yet) been made.

Fix MAL debugging interaction: we now always go through the new
function fetch_line() which checks for debugger prompts and sets the
mode accordingly.

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