filer: do not always save files in "/etc" folder to filer store

fix https://github.com/seaweedfs/seaweedfs/issues/3476

weed/filer/filer_conf.go

@@ -17,7 +17,7 @@ import (
 )
 
 const (
-	DirectoryEtcRoot      = "/etc"
+	DirectoryEtcRoot      = "/etc/"
 	DirectoryEtcSeaweedFS = "/etc/seaweedfs"
 	DirectoryEtcRemote    = "/etc/remote"
 	FilerConfName         = "filer.conf"

weed/server/filer_server_handlers_write_upload.go

@@ -9,12 +9,10 @@ import (
 	"io"
 	"net/http"
 	"strconv"
-	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
 
-	"github.com/seaweedfs/seaweedfs/weed/filer"
 	"github.com/seaweedfs/seaweedfs/weed/glog"
 	"github.com/seaweedfs/seaweedfs/weed/operation"
 	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
@@ -83,7 +81,7 @@ func (fs *FilerServer) uploadReaderToChunks(w http.ResponseWriter, r *http.Reque
 			break
 		}
 		if chunkOffset == 0 && !isAppend {
-			if dataSize < fs.option.SaveToFilerLimit || strings.HasPrefix(r.URL.Path, filer.DirectoryEtcRoot) {
+			if dataSize < fs.option.SaveToFilerLimit {
 				chunkOffset += dataSize
 				smallContent = make([]byte, dataSize)
 				bytesBuffer.Read(smallContent)