upstream: this test has been broken since 2014, and has been

testing the same key exchange algorithm repeatedly instead of testing all of
them. Spotted by nreilly AT blackberry.com in bz3692

Who broke the test? me.

OpenBSD-Regress-ID: 48f4f5946276f975667141957d25441b3c9a50e2

regress/rekey.sh

@@ -1,4 +1,4 @@
-#	$OpenBSD: rekey.sh,v 1.19 2021/07/19 05:08:54 dtucker Exp $
+#	$OpenBSD: rekey.sh,v 1.20 2024/05/22 04:20:00 djm Exp $
 #	Placed in the Public Domain.
 
 tid="rekey"
@@ -14,7 +14,7 @@ ssh_data_rekeying()
 {
 	_kexopt=$1 ; shift
 	_opts="$@"
-	if ! test -z "$_kexopts" ; then
+	if ! test -z "$_kexopt" ; then
 		cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy
 		echo "$_kexopt" >> $OBJ/sshd_proxy
 		_opts="$_opts -o$_kexopt"