secureserver.pl: added full support for tstunnel on Windows

tstunnel on Windows does not support the pid option and is unable
to write to an output log that is already being used as a redirection
target for stdout. Therefore it does now output all log data to stdout
by default and secureserver.pl creates a fake pidfile on Windows.

tests/secureserver.pl

@@ -248,19 +248,21 @@ if($stunnel_version >= 400) {
     $SIG{TERM} = \&exit_signal_handler;
     # stunnel configuration file
     if(open(STUNCONF, ">$conffile")) {
-	print STUNCONF "
-	CApath = $path
-	cert = $certfile
-	pid = $pidfile
-	debug = $loglevel
-	output = $logfile
-	socket = $socketopt
-	foreground = yes
-	
-	[curltest]
-	accept = $accept_port
-	connect = $target_port
-	";
+        print STUNCONF "
+            CApath = $path
+            cert = $certfile
+            debug = $loglevel
+            output = /dev/stdout
+            socket = $socketopt";
+        if($stunnel !~ /tstunnel(\.exe)?"?$/) {
+            print STUNCONF "
+            pid = $pidfile
+            foreground = yes";
+        }
+        print STUNCONF "
+            [curltest]
+            accept = $accept_port
+            connect = $target_port";
         if(!close(STUNCONF)) {
             print "$ssltext Error closing file $conffile\n";
             exit 1;
@@ -292,6 +294,25 @@ if($stunnel_version >= 400) {
 #
 chmod(0600, $certfile) if(-f $certfile);
 
+#***************************************************************************
+# Run tstunnel on Windows.
+#
+if($stunnel =~ /tstunnel(\.exe)?"?$/) {
+    # Fake pidfile for tstunnel on Windows.
+    if(open(OUT, ">$pidfile")) {
+        print OUT $$ . "\n";
+        close(OUT);
+    }
+
+    # Put an "exec" in front of the command so that the child process
+    # keeps this child's process ID.
+    exec("exec $cmd") || die "Can't exec() $cmd: $!";
+
+    # exec() should never return back here to this process. We protect
+    # ourselves by calling die() just in case something goes really bad.
+    die "error: exec() has returned";
+}
+
 #***************************************************************************
 # Run stunnel.
 #