[Rd] Regression in strptime

[Mick Jordan]

This is definitely obscure but we had a unit test that called 
.Internal(strptime, "1942/01/01", %Y/%m/%d") with timezone (TZ) set to 
CET. In R-3.1.3 that returned "1942-01-01 CEST" which, paradoxically, is 
correct as they evidently did strange things in Germany during the war 
period. Java also returns the same. However, R-3.2.4 returns "1942-01-01 
CET".

Mick Jordan