Fix #275: add back ADD_DISCUSSION constant
Fix #275: add back ADD_DISCUSSION constant

Conflict was resolved incorrectly and the variable was removed.

hasadna/anyway,njenia/anyway,hasadna/anyway,OmerSchechter/anyway,boazin/anyway,omerxx/anyway,idogi/anyway,njenia/anyway,OmerSchechter/anyway,esegal/anyway,idogi/anyway,HamutalCohen3/anyway,njenia/anyway,boazin/anyway,boazin/anyway,hasadna/anyway,hasadna/anyway,yosinv/anyway,OmerSchechter/anyway,HamutalCohen3/anyway,omerxx/anyway,HamutalCohen3/anyway,yosinv/anyway,idogi/anyway,omerxx/anyway,esegal/anyway,esegal/anyway,yosinv/anyway