bip148: ensure nodes are synced prior to bip148 date
bip148: ensure nodes are synced prior to bip148 date

Github-Pull: #10532
Rebased-From: a170d5f8bdae0f17b4b9c575b159015a538e1166

UASF/bitcoin,UASF/bitcoin,UASF/bitcoin,UASF/bitcoin,UASF/bitcoin,UASF/bitcoin