net/http: update bundled x/net/http2
Updates x/net/http2 (and x/net/lex/httplex) to git rev
749a502 for:
http2: don't sniff first Request.Body byte in Transport until we have a conn
https://golang.org/cl/29074
Fixes #17071
http2: add Transport support for unicode domain names
https://golang.org/cl/29071
Updates #13835
http2: don't send bogus :path pseudo headers if Request.URL.Opaque is set
https://golang.org/cl/27632
+
http2: fix bug where '*' as a valid :path value in Transport
https://golang.org/cl/29070
Updates #16847
http2: fix all vet warnings
https://golang.org/cl/28344
Updates #16228
Updates #11041
Also uses the new -underscore flag to x/tools/cmd/bundle from
https://golang.org/cl/29086
Change-Id: Ica0f6bf6e33266237e37527a166a783d78c059c4
Reviewed-on: https://go-review.googlesource.com/29110
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Chris Broadfoot <cbro@golang.org>