answer checking fix patch from "110704"

git-svn-id: http://svn.miranda-ng.org/main/trunk@3004 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
using boost for string cleanup

git-svn-id: http://svn.miranda-ng.org/main/trunk@3005 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c