curl: ignore SIGPIPE

This is a work-around for bug #1180 which is really libcurl's inability
to ignore SIGPIPE in a few cases. With this work-around at least curl
won't suffer from it!

Bug: http://curl.haxx.se/bug/view.cgi?id=1180
Reported by: Lluís Batlle i Rossell

src/tool_main.c

@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -23,6 +23,10 @@
 
 #include <sys/stat.h>
 
+#ifdef HAVE_SIGNAL_H
+#include <signal.h>
+#endif
+
 #define ENABLE_CURLX_PRINTF
 /* use our own printf() functions */
 #include "curlx.h"
@@ -83,6 +87,10 @@ int main(int argc, char *argv[])
 
   main_checkfds();
 
+#ifdef HAVE_SIGNAL
+  signal(SIGPIPE, SIG_IGN);
+#endif
+
   res = operate(&config, argc, argv);
 
 #ifdef __SYMBIAN32__