server/http: Add missing keep alive for incoming tcp connections. (#3585)
server/http: Add missing keep alive for incoming tcp connections. (#3585)

This was seen reproducing a bug with @gowithplanb. Windows Cloud
Berry clients do not close their respective connections.
hackintoshrao/minio,rushenn/minio,aead/minio,fwessels/minio,dvstate/minio,NitishT/minio,hackintoshrao/minio,fwessels/minio,donatello/minio,krishnasrinivas/minio,fwessels/minio,luomeiqin/minio,harshavardhana/minio,dvstate/minio,aead/minio,brendanashworth/minio,dutchcoders/minio,koolhead17/minio,NitishT/minio,hackintoshrao/minio,krisis/minio,luomeiqin/minio,krishnasrinivas/minio,minio/minio,dvstate/minio,harshavardhana/minio,luomeiqin/minio,vadmeste/minio,minio/minio,NitishT/minio,harshavardhana/minio,harshavardhana/minio,aead/minio,abperiasamy/minio,aead/minio,vadmeste/minio,abperiasamy/minio,abperiasamy/minio,harshavardhana/minio,NitishT/minio,harshavardhana/minio,fwessels/minio,dutchcoders/minio,jimjag/minio,jimjag/minio,brendanashworth/minio,dutchcoders/minio,rushenn/minio,harshavardhana/minio,krishnasrinivas/minio,krishnasrinivas/minio,hackintoshrao/minio,jimjag/minio,aead/minio,krisis/minio,brendanashworth/minio,luomeiqin/minio,aead/minio,balamurugana/minio,aead/minio,harshavardhana/minio,dutchcoders/minio,brendanashworth/minio,donatello/minio,aead/minio,koolhead17/minio,abperiasamy/minio,rushenn/minio,dvstate/minio,jimjag/minio,rushenn/minio,balamurugana/minio