message: Changed time limit to be in milliseconds and improved config parameter description.
diff: @@ -55,7 +55,7 @@ private:
  get_transactions_results ordered_transactions(const block_transaction_id_map& block_transaction_ids, const fc::time_point& start_time, const uint32_t begin, const uint32_t end) const;
  bool time_exceeded(const fc::time_point& start_time) const;
  };
  -const int64_t account_history_plugin_impl::DEFAULT_TRANSACTION_TIME_LIMIT = 3000;
  +const int64_t account_history_plugin_impl::DEFAULT_TRANSACTION_TIME_LIMIT = 3;
  optional<block_id_type> account_history_plugin_impl::find_block_id(const transaction_id_type& transaction_id) const
  {
  @@ -270,13 +270,13 @@ void account_history_plugin::set_program_options(options_description& cli, optio
  ("filter_on_accounts,f", bpo::value<vector<string>>()->composing(),
  "Track only transactions whose scopes involve the listed accounts. Default is to track all transactions.")
  ("get-transactions-time-limit", bpo::value<int>()->default_value(account_history_plugin_impl::DEFAULT_TRANSACTION_TIME_LIMIT),
  - "Limits the time to wait before returning for get_transactions")
  + "Limits the maximum time (in milliseconds) processing a single get_transactions call.")
  ;
  }
  void account_history_plugin::plugin_initialize(const variables_map& options)
  {
  - my->transactions_time_limit = options.at("get-transactions-time-limit").as<int>();
  + my->transactions_time_limit = options.at("get-transactions-time-limit").as<int>() * 1000;
  if(options.count("filter_on_accounts"))
  {
  