4206909 - adding Z_SYNC_FLUSH support to deflaters

[Alan Bateman]

Martin Buchholz wrote:
> :
> The use case for full flush is partial recoverability from future corruption
> of the data.  If the competing java zib libraries are supporting this
> flush variant,
> we probably should too, for completeness.
>   
It's worth considering although we get into detail as to how the flush 
mode is expressed in the constructor (an int is awkward because of the 
existing size parameter, and java.util.zip was well into adolescence 
when enums were introduced). The other option is to just ignore it as 
the proposed Deflater.deflate method supports full flush and it's not 
too difficult to create your own OutputStream that uses Deflater.

-Alan.