Function length

plugins/esi/combo_handler.cc:54–58

Because STL vs. C library leads to ugly casting, fix it once.

// Because STL vs. C library leads to ugly casting, fix it once.
inline int
length(std::string const &str)
{
  return static_cast<int>(str.size());
}

constexpr unsigned DEFAULT_MAX_FILE_COUNT = 100;
constexpr int      MAX_QUERY_LENGTH       = 4096;