config-old: Use interface to avoid code repetition. (#3769)
config-old: Use interface to avoid code repetition. (#3769)


abperiasamy/minio,harshavardhana/minio,harshavardhana/minio,jimjag/minio,aead/minio,balamurugana/minio,balamurugana/minio,jimjag/minio,krishnasrinivas/minio,NitishT/minio,krishnasrinivas/minio,harshavardhana/minio,krisis/minio,harshavardhana/minio,abperiasamy/minio,dvstate/minio,luomeiqin/minio,hackintoshrao/minio,NitishT/minio,jimjag/minio,minio/minio,rushenn/minio,jimjag/minio,harshavardhana/minio,dvstate/minio,hackintoshrao/minio,aead/minio,dvstate/minio,vadmeste/minio,krishnasrinivas/minio,NitishT/minio,brendanashworth/minio,rushenn/minio,donatello/minio,aead/minio,dutchcoders/minio,luomeiqin/minio,dvstate/minio,brendanashworth/minio,harshavardhana/minio,rushenn/minio,aead/minio,aead/minio,NitishT/minio,fwessels/minio,fwessels/minio,fwessels/minio,dutchcoders/minio,abperiasamy/minio,luomeiqin/minio,fwessels/minio,aead/minio,harshavardhana/minio,aead/minio,hackintoshrao/minio,hackintoshrao/minio,harshavardhana/minio,minio/minio,vadmeste/minio,brendanashworth/minio,brendanashworth/minio,dutchcoders/minio,rushenn/minio,donatello/minio,krishnasrinivas/minio,krisis/minio,luomeiqin/minio,abperiasamy/minio,dutchcoders/minio,aead/minio