doc/go1.5.html: fix typo

Change-Id: Ic61fd38e7d2e0821c6adcaa210199a7dae8849a7
Reviewed-on: https://go-review.googlesource.com/13281
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/doc/go1.5.html b/doc/go1.5.html
index b074911..70ce94e 100644
--- a/doc/go1.5.html
+++ b/doc/go1.5.html
@@ -1193,7 +1193,7 @@
 <li>
 The <a href="/pkg/net/http/cgi/"><code>net/http/cgi</code></a> package
 had a bug that mishandled the values of the environment variables
-<code>REMOTE_ADDR</code> ad <code>REMOTE_HOST</code>.
+<code>REMOTE_ADDR</code> and <code>REMOTE_HOST</code>.
 This has been fixed.
 Also, starting with Go 1.5 the package sets the <code>REMOTE_PORT</code>
 variable.