[mdb-dev] [patch] limited sql date support

[Nirgal <con...@ni...>]

The attached patch derived from the one at https://github.com/markrwilliams/mdbtools/commit/6e9b71af1ff194721928181dc9e694b65c999b98
provide limited sql support for date type.
Exemple usage:
select * from table where dt > 12345678.75

Here 12345678.75 is the number of second since epoch.
Not perfect, but still usefull.