date.h: 64-bit year and days representation
date.h: 64-bit year and days representation

We need 64-bit year and days representation to support the boundary
values of the CQL data type, which is implemented using Joda Time
library's DateTime type.

duarten/scylla,raphaelsc/scylla,avikivity/scylla,raphaelsc/scylla,avikivity/scylla,scylladb/scylla,raphaelsc/scylla,scylladb/scylla,scylladb/scylla,duarten/scylla,scylladb/scylla,duarten/scylla,avikivity/scylla