Support for custom header while uploading a fileto S3 aka X-Amz-Meta-*

[Arup Malakar]

Hello All,

I am trying to find if there is way to supply customer header (X-Amz-Meta-*) while uploading objects to S3 using the Put function http://godoc.org/launchpad.net/goamz/s3#Bucket.Put , but couldn't find it. Is it possible to provide custom headers while uploading 

a file to S3? I am also interested in an API to retrieve the meta info only (http HEAD call), without downloading the whole file. Let me 

know if it is doable. If it is not supported already,  I can take a stab at it.

Thanks,

Arup