rds: add path regex option, remove priority from VirtualCluster. (#55)
rds: add path regex option, remove priority from VirtualCluster. (#55)

Fixes #3.
lyft/envoy-api,rshriram/envoy-api,jrajahalme/envoy-api,lyft/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api,jrajahalme/envoy-api,lyft/envoy-api,rshriram/envoy-api,rshriram/envoy-api