Test that SNI is accessible from the SNI callback.

Later work is going to cause some turbulence here.

Change-Id: Iba98bcf56e81492ec0dca54a381b38d1c115247a
Reviewed-on: https://boringssl-review.googlesource.com/11843
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index 0d78754..5e159e9 100644
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -2331,9 +2331,9 @@
 
 /* SSL_CTX_set_tlsext_servername_callback configures |callback| to be called on
  * the server after ClientHello extensions have been parsed and returns one.
- * The callback may use |SSL_get_servername| to examine the server_name extension
- * and returns a |SSL_TLSEXT_ERR_*| value. The value of |arg| may be set by
- * calling |SSL_CTX_set_tlsext_servername_arg|.
+ * The callback may use |SSL_get_servername| to examine the server_name
+ * extension and returns a |SSL_TLSEXT_ERR_*| value. The value of |arg| may be
+ * set by calling |SSL_CTX_set_tlsext_servername_arg|.
  *
  * If the callback returns |SSL_TLSEXT_ERR_NOACK|, the server_name extension is
  * not acknowledged in the ServerHello. If the return value is