upstream: Roll back the hostname->uname change in rev 1.10. It turns

out uname -n doesn't do what we need for some platforms in portable, so we'll
fix the original problem (that some other platforms don't have hostname at
all) by providing wrapper function to implement it.

OpenBSD-Regress-ID: 827a707d6201d5a8e196a8c28aec1d2c76c52341

regress/percent.sh

@@ -1,4 +1,4 @@
-#	$OpenBSD: percent.sh,v 1.10 2021/02/05 06:01:58 dtucker Exp $
+#	$OpenBSD: percent.sh,v 1.11 2021/02/05 22:03:40 dtucker Exp $
 #	Placed in the Public Domain.
 
 tid="percent expansions"
@@ -10,8 +10,8 @@ fi
 
 USER=`id -u -n`
 USERID=`id -u`
-HOST=`uname -n | cut -f1 -d.`
-HOSTNAME=`uname -n`
+HOST=`hostname | cut -f1 -d.`
+HOSTNAME=`hostname`
 
 # Localcommand is evaluated after connection because %T is not available
 # until then.  Because of this we use a different method of exercising it,