Merge #1011: stats: update datadir_gb & pruned_gb

b2fccc1 stats: update pruned_gb to 10GB (fanquake)
9b02588 stats: update datadir_gb to 600GB (fanquake)

Pull request description:

  Should close #1010.

ACKs for top commit:
  glozow:
    Matches https://github.com/bitcoin/bitcoin/blob/6dabb315c4fb2cdc4421ed34dee5e19042f899c3/src/kernel/chainparams.cpp#L121-L122, so ACK b2fccc1

Tree-SHA512: 81bb573e1bd1ee4a2fa119cc6b6d060e57b4c81419541ce66693a45ef330010e437d3423b7f77fa4db81e5ef956a0d5c9a554f9bb6aaa7981d65e4f760f63e3b

Author: glozow

_data/stats.yml

@@ -1,15 +1,15 @@
 ## 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: "500"
+datadir_gb: "600"
 
 ## Size of the datadir with the maximum allowed pruning enabled.
 ## Suggest rounding up a little bit to give room for growth in the UTXO
 ## set and to account for things like pruning only happening
 ## at blk file boundaries and mempool saving.
-pruned_gb: "6"
+pruned_gb: "10"
 
-## Size of monthly increase in dadadir size.  For 1 MB blocks, 144
+## Size of monthly increase in datadir size.  For 1 MB blocks, 144
 ## blocks per day, 30 days per month, 1000 MB/GB: 1*144*30/1000 = 4.32 GB.
 ## Rounding that up to 5 GB and assuming it could quickly double with
 ## increased segwit adoption gives a range of 5 to 10 GB/month.