Add missing static specifiers

[Eran Kornblau]

> Hello!
> 
> On Thu, Mar 02, 2017 at 01:52:58PM +0000, Eran Kornblau wrote:
> 
> [...]
> 
> > # User Eran Kornblau <erankor at gmail.com> # Date 1488462360 18000
> > #      Thu Mar 02 08:46:00 2017 -0500
> > # Node ID ecf63ae67df1d5768be40966a5afadb751d894bc
> > # Parent  8b7fd958c59f8280d167fe7dd93f1942bfed5876
> > Added missing static specifiers.
> 
> Committed with (with some minor style changes in select/poll modules), thanks.
> 
Thanks Maxim!

> --
> Maxim Dounin
> http://nginx.org/
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Eran