os: remove Getenverror
Fixes #3065
R=golang-dev, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5675094
diff --git a/doc/go1.html b/doc/go1.html
index 59d8e25..9e98a97 100644
--- a/doc/go1.html
+++ b/doc/go1.html
@@ -1451,7 +1451,14 @@
<a href="/pkg/os/#ErrPermission"><code>ErrPermission</code></a>
and
<a href="/pkg/os/#ErrNoEnv"><code>ErrNoEnv</code></a>.
+</p>
+<p>
+The <code>Getenverror</code> function has been removed. To distinguish
+between a non-existent environment variable and an empty string,
+use <a href="/pkg/os/#Environ"><code>os.Environ</code></a> or
+<a href="/pkg/syscall/#Getenv"><code>syscall.Getenv</code></a>.
+</p>
<p>
<em>Updating</em>:
