git backend: actually update local cache from remote

[Robert C. Helling]

Dirk,



> Am 11.06.2015 um 16:53 schrieb Dirk Hohndel <dirk at hohndel.org>:
> 
> https://cloud.subsurface-divelog.org/make-latte?number-of-shots=3
> 
> if the response is
> 
> 418 with text "Linus does not like non-fat milk"
> 
> we have established a working connection.

I think you still have to work on this: I get a pretty boring 404 without any dietary preference information. 

I wonder how many people besides me actually clicked on that link. 

Robert