DUBLIN (Reuters) - British and European Union Brexit negotiators have reached agreement on a deal for all Irish issues, including the maintenance of regulatory alignment on the island to avoid a hard border, two Irish government sources told Reuters.  Agreement has been reached on an overall deal for the Irish issues,  one of the sources said.  The key phrase is a clear commitment to maintaining regulatory alignment in relation to the rules of the customs union and internal market which are required to support the Good Friday Agreement, the all-island economy and the border.  