lzma mdboxes with unexpected EOF

[Bjoern Franke]

Hi,

> 
> But I'm wondering why that happened at all. I stumpled upon [1] but
> there was no further discussion about it.
> 

it seems it was caused by a bug mentioned in 2.3.13's changelog:

- lib-compression: Using xz/lzma compression in v2.3.11 could have
  written truncated output in some situations. This would result in
  "Broken pipe" read errors when trying to read it back.

So, sorry for the noise :)

Best Regards
Bjoern