rem: return match_target(true, apt_package_records->Lookup(ver.FileList()).LongDesc().c_str());
add: return match_target(true, apt_package_records->Lookup(ver.FileList()).Maintainer().c_str());
context:   match_target val(const pkgCache::PkgIterator &pkg,		   const pkgCache::VerIterator &ver)  {    if(ver.end())      return match_target(false, "");    else      return match_target(true, apt_package_records->Lookup(ver.FileList()).LongDesc().c_str());  }