Support for S3 API's outside of AWS

[Karamorf]

My company runs an internal Object Storage with a compatible S3 API. It would be nice if I could specify the host. It works by overwriting the HOST value like this:
S3::HOST = 'some.other.domain.com'

But that does output a warning message:
warning: previous definition of HOST was here

Anywise, more of a nice to have then anything else.

[adrianmo]

I'm also interested in using it with a non-AWS S3-compatible API. A part from the host, which can be changed with the workaround @Karamorf mentioned, it would be good to allow custom port configuration, not just 80 or 443.

[qoobaa]

From now on, there's a class variable S3.host you can change. Changing connection settings like using SSL is possible when you create an S3::Connection object.