Method value_is_valid

include/proxy/hdrs/MIME.h:1060–1070

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inline bool
MIMEField::value_is_valid(uint32_t invalid_char_bits) const
{
  auto value{value_get()};
  for (auto c : value) {
    if (ParseRules::is_type(c, invalid_char_bits)) {
      return false;
    }
  }
  return true;
}

inline int
MIMEField::has_dups() const