net/url: url.Parse allows spaces in the host.

[crhino]

http://play.golang.org/p/LqMUDBV17m

From my understanding of RFC 3986, spaces are not allowed in the host name. Any help clarifying whether this is intended behavior or not would be great.

[bradfitz]

Related, or dup: #11206

[rsc]

Accepting space seems like a mistake. Will try to not do that and see how much complaint we get.

[gopherbot]

CL https://golang.org/cl/17387 mentions this issue.