////////////////////////////////////////////////////////////////////////////////
/// @startDocuBlock JSF_get_admin_statistics
/// @brief return the statistics information
///
/// @RESTHEADER{GET /_admin/statistics, Read the statistics}
///
/// @RESTDESCRIPTION
///
/// Returns the statistics information. The returned object contains the
/// statistics figures grouped together according to the description returned by
/// *_admin/statistics-description*. For instance, to access a figure *userTime*
/// from the group *system*, you first select the sub-object describing the
/// group stored in *system* and in that sub-object the value for *userTime* is
/// stored in the attribute of the same name.
///
/// In case of a distribution, the returned object contains the total count in
/// *count* and the distribution list in *counts*. The sum (or total) of the
/// individual values is returned in *sum*.
///
/// @RESTRETURNCODES
///
/// @RESTRETURNCODE{200}
/// Statistics were returned successfully.
///
/// @EXAMPLES
///
/// @EXAMPLE_ARANGOSH_RUN{RestAdminStatistics1}
///     var url = "/_admin/statistics";
///     var response = logCurlRequest('GET', url);
///
///     assert(response.code === 200);
///
///     logJsonResponse(response);
/// @END_EXAMPLE_ARANGOSH_RUN
/// @endDocuBlock
////////////////////////////////////////////////////////////////////////////////