Update radiusd.conf(5) man page and its example to recommend to

surround words with double quote.  Also fix a bug in the man page
that module argument was missing for "module set".

src/etc/examples/radiusd.conf

@@ -1,4 +1,4 @@
-#	$OpenBSD: radiusd.conf,v 1.1 2015/08/03 04:19:25 yasuoka Exp $
+#	$OpenBSD: radiusd.conf,v 1.2 2019/04/01 09:40:16 yasuoka Exp $
 
 listen on 0.0.0.0
 #listen on ::
@@ -11,16 +11,16 @@ client 192.168.0.0/24 {
 	msgauth-required yes
 }
 
-module load bsdauth "/usr/libexec/radiusd/radiusd_bsdauth"
-module set bsdauth  restrict-group operator
+module load "bsdauth" "/usr/libexec/radiusd/radiusd_bsdauth"
+module set "bsdauth" "restrict-group" "operator"
 
-module load radius  "/usr/libexec/radiusd/radiusd_radius"
-module set radius "secret" "testing123"
-module set radius "server" "127.0.0.1"
+module load "radius"  "/usr/libexec/radiusd/radiusd_radius"
+module set "radius" "secret" "testing123"
+module set "radius" "server" "127.0.0.1"
 
 authenticate *@local {
-	authenticate-by bsdauth
+	authenticate-by "bsdauth"
 }
 authenticate *@example.com {
-	authenticate-by radius
+	authenticate-by "radius"
 }