small net cleanup

- add comment for disabling sigpipe
- add closing comment in compat.h
- remove redundant check in net.h

src/compat.h

@@ -1,5 +1,5 @@
 // Copyright (c) 2009-2010 Satoshi Nakamoto
-// Copyright (c) 2009-2013 The Bitcoin developers
+// Copyright (c) 2009-2014 The Bitcoin developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -59,4 +59,4 @@ typedef u_int SOCKET;
 #define SOCKET_ERROR        -1
 #endif
 
-#endif
+#endif // _BITCOIN_COMPAT_H