Upstream: skip empty cache headers.

Notably this fixes HTTP_IF_MODIFIED_SINCE which was always sent with
cache enabled in fastcgi/scgi/uwsgi after 43ccaf8e8728.
3 files changed
tree: 9401620606220c46581e078255f48b9ca0547b70
  1. auto/
  2. conf/
  3. contrib/
  4. docs/
  5. misc/
  6. src/
  7. .hgtags