talks: fix typos and other small issues in State of Go 2017

Change-Id: Ibacf27ca12c9c7438c58725b7da047464f9f87ee
Reviewed-on: https://go-review.googlesource.com/36333
Reviewed-by: Rob Pike <r@golang.org>

2017/state-of-go.slide

diff --git a/2017/state-of-go.slide b/2017/state-of-go.slide
index 634804a..e756037 100644
--- a/2017/state-of-go.slide
+++ b/2017/state-of-go.slide
@@ -8,7 +8,7 @@
 
 * Time flies
 
-Go 1.6 is one year old (happy birthday!)
+Go 1.6 is one year old (Happy Birthday!)
 
 Go 1.7 is already 6 months old!
 
@@ -189,7 +189,7 @@
 	fatal error: concurrent map read and map write
 	fatal error: concurrent map writes
 
-* Mutext Contention Profiling
+* Mutex Contention Profiling
 
 Profile your benchmarks and the contention on your mutexes.
 
@@ -417,6 +417,8 @@
 
     go build -buildmode=plugin
 
+_Note_: This currently works only on Linux.
+
 * Plugins
 
 .code state-of-go/stdlib/plugin/main.go /plugin.Open/,/Hello/

2017/state-of-go/stdlib/http2/http2.go

diff --git a/2017/state-of-go/stdlib/http2/http2.go b/2017/state-of-go/stdlib/http2/http2.go
index e370961..c1b563e 100644
--- a/2017/state-of-go/stdlib/http2/http2.go
+++ b/2017/state-of-go/stdlib/http2/http2.go
@@ -11,7 +11,7 @@
 var cert, key string
 
 func init() {
-	pkg, err := build.Import("golang.org/x/talks/2017/state-of-go/http2", ".", build.FindOnly)
+	pkg, err := build.Import("golang.org/x/talks/2017/state-of-go/stdlib/http2", ".", build.FindOnly)
 	if err != nil {
 		log.Fatal(err)
 	}