Add TLSv1.3 client side external PSK support

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3670)
diff --git a/ssl/ssl_err.c b/ssl/ssl_err.c
index eccc5af..0b82c0e 100644
--- a/ssl/ssl_err.c
+++ b/ssl/ssl_err.c
@@ -594,6 +594,7 @@
     {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_PACKET_LENGTH), "bad packet length"},
     {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_PROTOCOL_VERSION_NUMBER),
     "bad protocol version number"},
+    {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_PSK), "bad psk"},
     {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_PSK_IDENTITY), "bad psk identity"},
     {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_RECORD_TYPE), "bad record type"},
     {ERR_PACK(ERR_LIB_SSL, 0, SSL_R_BAD_RSA_ENCRYPT), "bad rsa encrypt"},