This change adds support for complex indexes for sets and tables. With
this change, sets with indexes like:
set[string, count, count]
will function. Before this change, Zeek raised an error message in these
cases.
Addresses GH-1033
Particularly, the final output order of a table/set is sensitive to
order of input/insertions and some tests were converting
std::unordered_{set,map} to Zeek table/set and iteration over those
standard containers may not always loop through elements in the same
order across all platforms.
Haven't checked different build configurations yet, but all except
a few SumStats tests are stable for me now. The external tests
are also completely failing, but haven't looked at those yet.
With this, the basic functionality of &backend seems to be working.
It is not yet integrated with zeekctl, one has to manually specify the
storage location for the sqlite files somewhere when using sqlite.
Usage for memory stores:
global table_to_share: table[string] of count &backend=Broker::MEMORY;
Usage for sqlite stores:
redef Broker::auto_store_db_directory = "[path]";
global table_to_share: table[string] of count &backend=Broker::SQLITE;
In both cases, the cluster should automatically sync to changes done by
any node. When using sqlite, data should also be saved to disk and
re-loaded on startup.
