Doc update for case insensitive path matching

doc/grpc_xds_features.md

@@ -41,4 +41,5 @@ Features | gRFCs  | [C++, Python,<br> Ruby, PHP](https://github.com/grpc/grpc/re
 ---------|--------|--------------|------|------|------
 **xDS Infrastructure in gRPC client channel:**<ul><li>LDS->RDS->CDS->EDS flow</li><li>ADS stream</li></ul> | [A27](https://github.com/grpc/proposal/blob/master/A27-xds-global-load-balancing.md) | v1.30.0  | v1.30.0 | v1.30.0 | v1.2.0 |
 **Load Balancing:**<ul><li>[Virtual host](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-virtualhost) domains matching</li><li>Only default path ("" or "/") matching</li><li>Priority-based weighted round-robin locality picking</li><li>Round-robin endpoint picking within locality</li><li>[Cluster](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#envoy-api-msg-route-routeaction) route action</li><li>Client-side Load reporting via [LRS](https://github.com/envoyproxy/data-plane-api/blob/master/envoy/service/load_stats/v2/lrs.proto)</li></ul> | [A27](https://github.com/grpc/proposal/blob/master/A27-xds-global-load-balancing.md) | v1.30.0  | v1.30.0 | v1.30.0 | v1.2.0 |
-Request matching based on:<ul><li>[Path](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-routematch) (prefix, full path and safe regex)</li><li>[Headers](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-headermatcher)</li></ul>Request routing to multiple clusters based on [weights](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-weightedcluster) | [A28](https://github.com/grpc/proposal/blob/master/A28-xds-traffic-splitting-and-routing.md) | v1.31.0 | v1.31.0 | v1.31.0 | |
+Request matching based on:<ul><li>[Path](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-routematch) (prefix, full path and safe regex)</li><ul><li>[case_sensitive](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-routematch) must be true else config is NACKed</li></ul><li>[Headers](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-headermatcher)</li></ul>Request routing to multiple clusters based on [weights](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-weightedcluster) | [A28](https://github.com/grpc/proposal/blob/master/A28-xds-traffic-splitting-and-routing.md) | v1.31.0 | v1.31.0 | v1.31.0 | |
+Case insensitive prefix/full path matching:<ul><li>[case_sensitive](https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/route/route_components.proto#route-routematch) can be true or false</li></ul> | | v1.34.0 | v1.34.0 | v1.34.0 | |