Add Error state

Reusing an SSL object when it has encountered a fatal error can
have bad consequences. This is a bug in application code not libssl
but libssl should be more forgiving and not crash.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(cherry picked from commit a89db885e0)

Conflicts:
	ssl/s3_srvr.c
	ssl/ssl_stat.c

ssl/ssl_stat.c

@@ -117,6 +117,9 @@ const char *SSL_state_string_long(const SSL *s)
     case SSL_ST_OK | SSL_ST_ACCEPT:
         str = "ok/accept SSL initialization";
         break;
+    case SSL_ST_ERR:
+        str = "error";
+        break;
 #ifndef OPENSSL_NO_SSL2
     case SSL2_ST_CLIENT_START_ENCRYPTION:
         str = "SSLv2 client start encryption";
@@ -496,6 +499,9 @@ const char *SSL_state_string(const SSL *s)
     case SSL_ST_OK:
         str = "SSLOK ";
         break;
+    case SSL_ST_ERR:
+        str = "SSLERR";
+        break;
 #ifndef OPENSSL_NO_SSL2
     case SSL2_ST_CLIENT_START_ENCRYPTION:
         str = "2CSENC";