tools: add argsparse to check format. Allow additional excluded prefixes (#1136)
tools: add argsparse to check format. Allow additional excluded prefixes (#1136)


eklitzke/envoy,eklitzke/envoy,istio/envoy,amalgam8/envoy,sebrandon1/envoy,rlazarus/envoy,sebrandon1/envoy,craffert0/envoy,fengli79/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,envoyproxy/envoy,dnoe/envoy,craffert0/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,lizan/envoy,jrajahalme/envoy,eklitzke/envoy,tdmackey/envoy,envoyproxy/envoy,htuch/envoy,jrajahalme/envoy,eklitzke/envoy,tdmackey/envoy,istio/envoy,envoyproxy/envoy-wasm,lizan/envoy,envoyproxy/envoy,amalgam8/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,sebrandon1/envoy,fengli79/envoy,envoyproxy/envoy,istio/envoy,craffert0/envoy,envoyproxy/envoy-wasm,lyft/envoy,dnoe/envoy,amalgam8/envoy,amalgam8/envoy,lyft/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,sebrandon1/envoy,eklitzke/envoy,envoyproxy/envoy,eklitzke/envoy,istio/envoy,tdmackey/envoy,istio/envoy,craffert0/envoy,dnoe/envoy,lyft/envoy,jrajahalme/envoy,htuch/envoy,dnoe/envoy,lizan/envoy,istio/envoy,rlazarus/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,sebrandon1/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,tdmackey/envoy,jrajahalme/envoy,lizan/envoy,istio/envoy,rlazarus/envoy,envoyproxy/envoy-wasm,fengli79/envoy,htuch/envoy,dnoe/envoy,rlazarus/envoy,fengli79/envoy,envoyproxy/envoy