Add some missing extensions to SSL_extension_supported()

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>

ssl/t1_ext.c

diff --git a/ssl/t1_ext.c b/ssl/t1_ext.c
index ae6e978..1821647 100644
--- a/ssl/t1_ext.c
+++ b/ssl/t1_ext.c
@@ -258,6 +258,9 @@
 #ifdef TLSEXT_TYPE_encrypt_then_mac
     case TLSEXT_TYPE_encrypt_then_mac:
 #endif
+    case TLSEXT_TYPE_key_share:
+    case TLSEXT_TYPE_supported_versions:
+    case TLSEXT_TYPE_extended_master_secret:
         return 1;
     default:
         return 0;