add sig_ign处理

server/wsproxy/app.cc

@@ -1,5 +1,6 @@
 #include "precompile.h"
 
+#include <signal.h>
 #include <string.h>
 #include <unistd.h>
 #include <mutex>
@@ -76,6 +77,7 @@ void App::Init(int argc, char* argv[])
         return;
     }
     a8::XPrintf("masterserver starting instance_id:%d pid:%d\n", {instance_id, getpid()});
+    signal(SIGPIPE, SIG_IGN);
 
     loop_mutex_ = new std::mutex();
     loop_cond_ = new std::condition_variable();