pagespeed/ngx_pagespeed — pull request #822 by oschaaf (2014-10-10 15:34:12+00:00)
Title: script-filters: Allow using script variables in Enable/DisableFilters

To support a non-evil way (if-in-location) of tuning SPDY specific
configuration, allow scripting of Enable/DisableFilters in nginx.conf

Example:
```bash
server {
pagespeed RewriteLevel PassThrough;
pagespeed EnableFilters rewrite_images;
set $spdy_disable "";

if ($spdy) {
set $spdy_disable "rewrite_images";
}
pagespeed DisableFilters "$spdy_disable";
}
```