Files with symbols in name cause an AWS signature error

[HexaJohn]

Issue
Filenames containing any of these symbols !@$&()=+; cause AWS to return an error:
SignatureDoesNotMatch "The request signature we calculated does not match the signature you provided. Check your key and signing method."

This is problematic because filenames such as "Image (Copy).png" are quite common on desktop OS's.

Files containing ~`[]{}#%^-_ in the name don't seem to affect the signature.

To Reproduce:
Specify an AWS S3 endpoint and bucket. Initiate an fPutObject request to upload a file containing one of the problematic symbols in the name. The response from Amazon will be "SignatureDoesNotMatch". Using minio: ^2.0.0-pre for testing.

[xtyxtyx]

Fixed in 3.0.0.