Cache: normalization of some Vary headers.
Cache: normalization of some Vary headers.

Spaces in Accept-Charset, Accept-Encoding, and Accept-Language headers
are now ignored.  As per syntax of these headers spaces can only appear
in places where they are optional.

firebase/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx,hy0kl/nginx,firebase/nginx