383a9c6da9
This adds the https://abseil.io library as a submodule. The patch series that follows needs a hash table that supports heterogeneous lookup, and abseil has a really good hash table that supports that (https://abseil.io/blog/20180927-swisstables). The library is still not available in Fedora, but it is fairly easy to use it directly from a submodule. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>
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