Sorry, Peter.  I forgot the handling of fn:concat() in my new simplifier.
Sorry, Peter.  I forgot the handling of fn:concat() in my new
simplifier.

(Well, I couldn't test before, for that bug that was in
milprint_summer.c... ;-)  TestWeb now looks pretty good, though
it shows a bunch of "no matching MIL operator to 'count(oid)'".
But this seems like something unrelated to my changes in the
simplifier.)

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