Since /dev/stdout is not always emulated on Windows, just skip the output option on Windows. MinGW/msys support /dev/stdout only from a new login shell.
@@ -252,10 +252,10 @@ if($stunnel_version >= 400) {
CApath = $path
cert = $certfile
debug = $loglevel
- output = /dev/stdout
socket = $socketopt";
if($stunnel !~ /tstunnel(\.exe)?"?$/) {
print STUNCONF "
+ output = $logfile
pid = $pidfile
foreground = yes";
}