pt-server final "ok" message not showing via pipe

[epruesse]

The last message the PT-server prints when it is loading is:

ok, server is running.

This message indicates that it has successfully completed the loading stage and is now ready to accept connections.

However, if the PT-servers output stream is buffered (e.g. piping through "tee" or running from an external program), the message will not be rendered until sufficient error messages are printed or the PT-server exits.

I propose adding a fflush (maybe even on stable?) to have this message appear immediately in all cases.

Index: PROBE/PT_main.cxx
===================================================================
--- PROBE/PT_main.cxx   (revision 6417)
+++ PROBE/PT_main.cxx   (working copy)
@@ -373,6 +373,7 @@

     // all ok -> main "loop"
     printf("ok, server is running.\n");
+    fflush(stdout);
     aisc_accept_calls(so);
     aisc_server_shutdown_and_exit(so, EXIT_SUCCESS); // never returns
 }

[westram]

impl by [6418] + [6419]