filer: processing all response headers, no pass through to volume server

* filer calculate MD5 etag
* filer handle response headers, instread of pass it to volume servers

k8s/seaweedfs/templates/filer-statefulset.yaml

@@ -99,9 +99,6 @@ spec:
               {{- end }}
               filer \
               -port={{ .Values.filer.port }} \
-              {{- if .Values.filer.redirectOnRead }}
-              -redirectOnRead \
-              {{- end }}
               {{- if .Values.filer.disableHttp }}
               -disableHttp \
               {{- end }}

k8s/seaweedfs/values.yaml

@@ -177,9 +177,6 @@ filer:
   grpcPort: 18888
   loggingOverrideLevel: null
 
-  # Whether proxy or redirect to volume server during file GET request
-  redirectOnRead: false
-
   # Limit sub dir listing size (default 100000)
   dirListLimit: 100000