docs: Unhide RedirectAction.prefix_rewrite and strip_query (#528)
docs: Unhide RedirectAction.prefix_rewrite and strip_query (#528)

Issue ref: envoyproxy/envoy#2343
envoy ref: envoyproxy/envoy#2661
DP ref: envoyproxy/data-plane-api#456

Signed-off-by: Madhavan Balasubramanian <c03e8b6a127d55f9b2b491a22d94b8926af19ed6@ebay.com>
lyft/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api,lyft/envoy-api,lyft/envoy-api,jrajahalme/envoy-api