[P2P] Do not store more than 200 timedata samples.
[P2P] Do not store more than 200 timedata samples.

Backport of https://github.com/bitcoin/bitcoin/pull/6545
PIVX-Project/PIVX,Mrs-X/Darknet,PIVX-Project/PIVX,Mrs-X/PIVX,Mrs-X/Darknet,Mrs-X/Darknet,Mrs-X/PIVX,PIVX-Project/PIVX,Darknet-Crypto/Darknet,PIVX-Project/PIVX,PIVX-Project/PIVX,Mrs-X/Darknet,Darknet-Crypto/Darknet,Mrs-X/PIVX,Mrs-X/PIVX,Darknet-Crypto/Darknet,PIVX-Project/PIVX,Mrs-X/Darknet,PIVX-Project/PIVX,Mrs-X/PIVX,Darknet-Crypto/Darknet,PIVX-Project/PIVX,Mrs-X/PIVX,PIVX-Project/PIVX,Darknet-Crypto/Darknet,Darknet-Crypto/Darknet,Mrs-X/Darknet