Merge #916: stats: increase assumed datadir size to 500GB

b80b8d7 stats: increase assumed datadir size to 500GB (fanquake)

Pull request description:

  See: https://github.com/bitcoin/bitcoin/blob/dce93b2dd7a96398058cd7ef0044a3d48b608cba/src/chainparams.cpp#L110.

Top commit has no ACKs.

Tree-SHA512: 7cf98469de508d28bcfda5e3d764abe5f6bb849ae599576e02bfc6de4aadbc6c4feedc56a0d851bb4ad6f1e6c3b36fbd163e2e72233ba29b221df882a15463bd

Author: fanquake

_data/stats.yml

@@ -1,7 +1,7 @@
 ## Size of the Bitcoin Core data directory running with default settings.
 ## Suggest rounding up by about 10% so it doesn't need to be updated
 ## too often.
-datadir_gb: "400"
+datadir_gb: "500"
 
 ## Size of the datadir with the maximum allowed pruning enabled.
 ## Suggest rounding up a little bit to give room for growth in the UTXO