Changed the way running external commands are hanlded to address issues with it not working on some systems/configurations. Just using system and popen and fw commands are run with stdout and stderr tied to gether.

git-svn-id: file:///home/mbr/svn/fwknop/trunk@230 510a4753-2344-4c79-9c09-4d669213fbeb

server/sig_handler.c

@@ -61,6 +61,7 @@ sig_handler(int sig)
             return;
         case SIGCHLD:
             got_sigchld = 1;
+            waitpid(-1, NULL, WNOHANG);
             return;
     }
 }