[Request] Domain manipulation

[kaldown]

Is there any useful way to manipulate domains?

Reasoning:
let's say I have https://s3.amazonaws.com
I need to build endpoint with bucket name
f.domain.add('my-bucket')

then I need to create website out of it:

>> f.url
https://my-bucket.s3.amazonaws.com
>>> f.domain.part[1] = "s3-website-region"

In total:

>>> f.url
https://my-bucket.s3-website-region.amazonaws.com

[gruns]

not yet unfortunately

great domain support will be added with #110, which i've started but not yet completed