Rename the HttpBody export to Body

[seanmonstar]

When the concrete Body struct is removed, we can export the http_body::Body trait as just Body.

[yuri-potatoq]

What would be the advantage in case of import both trait and struct?

[seanmonstar]

The struct will be removed, as detailed in #2345.

[RajivTS]

I am just starting up with Hyper so would like to work on this task (if that's ok). By renaming and exporting the http_body::Body trait as just Body, I assume you are talking about updating the following:

hyper/src/body/mod.rs

Lines 19 to 23 in 84f6ae7

	pub use http_body::Body as HttpBody;
	pub use http_body::SizeHint;
	pub use self::aggregate::aggregate;
	pub use self::body::{Body, Sender};

But since the concrete Body type is already exported as Body, wouldn't that cause a conflict? Should I get rid of the concrete type export?

[seanmonstar]

Yes, we'd need to finish removing parts of Body, and renaming that. Then this one would be straightforward.

[RajivTS]

Is there a separate task that I can work on to remove parts of Body?

[seanmonstar]

@RajivTS The top comment in #2345 includes a list of tasks, and I tried to put them in order of unblocking the next one. Some are linked to specific issues, we can make more of them issues too.