Verify that extensions are used in the correct context

Perl changes reviewed by Richard Levitte. Non-perl changes reviewed by Rich
Salz

Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index 14a44a5..68856ee 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -354,6 +354,7 @@
     {ERR_REASON(SSL_R_BAD_DIGEST_LENGTH), "bad digest length"},
     {ERR_REASON(SSL_R_BAD_ECC_CERT), "bad ecc cert"},
     {ERR_REASON(SSL_R_BAD_ECPOINT), "bad ecpoint"},
+    {ERR_REASON(SSL_R_BAD_EXTENSION), "bad extension"},
     {ERR_REASON(SSL_R_BAD_HANDSHAKE_LENGTH), "bad handshake length"},
     {ERR_REASON(SSL_R_BAD_HELLO_REQUEST), "bad hello request"},
     {ERR_REASON(SSL_R_BAD_KEY_SHARE), "bad key share"},