BUG/MINOR: ssl: bind_conf is uncorrectly accessed when using QUIC

Since commit 9b2598 ("BUG/MEDIUM: ssl: Verify error codes can exceed
63"), the ca_ignerr_bitfield and crt_ignerr_bietfield are incorrecly
accessed from __objt_listener(conn->target)->bind_conf which is not
avaiable from QUIC. The bind_conf variable was mistakenly replaced.

This patch fixes the issue by using again the bind_conf variable.

Must be backported where 9b2598 was backported.
diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 811b3d8..8dba501 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -1778,7 +1778,7 @@
 		}
 
 		if (err <= SSL_MAX_VFY_ERROR_CODE &&
-		    cert_ignerr_bitfield_get(__objt_listener(conn->target)->bind_conf->ca_ignerr_bitfield, err))
+		    cert_ignerr_bitfield_get(bind_conf->ca_ignerr_bitfield, err))
 			goto err_ignored;
 
 		/* TODO: for QUIC connection, this error code is lost */
@@ -1792,7 +1792,7 @@
 
 	/* check if certificate error needs to be ignored */
 	if (err <= SSL_MAX_VFY_ERROR_CODE &&
-	    cert_ignerr_bitfield_get(__objt_listener(conn->target)->bind_conf->crt_ignerr_bitfield, err))
+	    cert_ignerr_bitfield_get(bind_conf->crt_ignerr_bitfield, err))
 		goto err_ignored;
 
 	/* TODO: for QUIC connection, this error code is lost */