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hostname= 

        # URI::Generic.hostname=

(from ruby core)
### Implementation from Generic
---
    hostname=(v)

---

Sets the host part of the URI as the argument with brackets for IPv6
addresses.

This method is the same as URI::Generic#host= except the argument can be
a bare IPv6 address.

    uri = URI("http://foo/bar")
    uri.hostname = "::1"
    uri.to_s  #=> "http://[::1]/bar"

If the argument seems to be an IPv6 address, it is wrapped with
brackets.

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