Move S_I* constants and MSG_NOSIGNAL to compat.h

src/compat.h

@@ -59,6 +59,20 @@ typedef u_int SOCKET;
 #define SOCKET_ERROR        -1
 #endif
 
+#ifdef WIN32
+#ifndef S_IRUSR
+#define S_IRUSR             0400
+#define S_IWUSR             0200
+#endif
+#else
+#define MAX_PATH            1024
+#endif
+
+// As Solaris does not have the MSG_NOSIGNAL flag for send(2) syscall, it is defined as 0
+#if !defined(HAVE_MSG_NOSIGNAL) && !defined(MSG_NOSIGNAL)
+#define MSG_NOSIGNAL 0
+#endif
+
 #ifndef WIN32
 // PRIO_MAX is not defined on Solaris
 #ifndef PRIO_MAX