first batch of cppcheck disables and a few more stl-ifications,

involving use of accumulate() .

src/nfa/mcclellancompile_util.cpp

@@ -265,6 +265,7 @@ bool can_die_early(const raw_dfa &raw, dstate_id_t s,
     }
 
     for (const auto &next : raw.states[s].next) {
+        // cppcheck-suppress useStlAlgorithm
         if (can_die_early(raw, next, visited, age_limit - 1)) {
             return true;
         }