Remove proxy_cache_use_stale updating; from nginx config

[Spacedust]

This is causing errors to cache.

Example user is placing something is the folder and instead of contents he sees 403 Forbidden error like not files were uploaded.

Also please add an option to change microcache time. I would like to have just 1 second instead of 10. Since the files are very often change I had to create my own custom files each time.

[MRatWork]

About 'proxy_cache_use_stale', I will disable it.

About microcache, the value is valid in most situation. Related to your issue, copy all proxy*.conf inside globals to custom.proxy*.conf and then modified this custom files. Need fixweb and restart-web after that.