bugfix, use gloable post_filters array
bugfix: foreach is gone continue => return false
distinguish between AND or OR query for postfilter

1: if we need postfiltern and user requested an anyOf REPORT, we can not
   prefilter via SQL or we could loose some valid request.

2: when we postfilter for an anyOf REPORT only one filter fragment must
   be true => we have to split the filters
bugfix typos