Add version as part of Server: header (#7100)
Add version as part of Server: header (#7100)

This was agreed after discussing with @abperiasamy, we
borrowed the idea from Apache's own documentation.
harshavardhana/minio,krisis/minio,NitishT/minio,jimjag/minio,aead/minio,fwessels/minio,aead/minio,harshavardhana/minio,fwessels/minio,jimjag/minio,donatello/minio,balamurugana/minio,harshavardhana/minio,vadmeste/minio,harshavardhana/minio,jimjag/minio,aead/minio,aead/minio,aead/minio,balamurugana/minio,fwessels/minio,krisis/minio,minio/minio,krishnasrinivas/minio,minio/minio,NitishT/minio,krishnasrinivas/minio,aead/minio,aead/minio,krishnasrinivas/minio,harshavardhana/minio,donatello/minio,vadmeste/minio,krishnasrinivas/minio,aead/minio,harshavardhana/minio,harshavardhana/minio,harshavardhana/minio,fwessels/minio,jimjag/minio,NitishT/minio,NitishT/minio