tree c7a7f73a76ca0e61aa44e6bfd0d1c82f76a2ba34
parent 3c0207e9efc488c9365d707ec13dad6cd8ca9fc4
author Shawn Pearce <sop@google.com> 1464649142 -0700
committer Shawn Pearce <sop@google.com> 1464649145 -0700

Include Vary: Accept-Encoding when using gzip

This is strongly encouraged to ensure caches only send a cached gzip
response only to user agents that understand gzip encoding. Gitiles
has been getting lucky due to most responses being uncached, or cached
only on the end user's browser with ETag revalidation.

We may in the future want to allow caching public resources that
are anonymously available. Doing this fix now ensures we are not
surprised later if we try to improve the HTTP caching headers.

Change-Id: Ide66426c956813218d10bdad99af775ca6a5e2be