win32sockets.c is now added with winsock init/cleanup example functions

docs/examples/win32sockets.c

@@ -0,0 +1,41 @@
+/*
+ * These are example functions doing socket init that Windows
+ * require. If you don't use windows, you can safely ignore this crap.
+ */
+
+#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
+static void win32_cleanup(void)
+{
+  WSACleanup();
+}
+
+static CURLcode win32_init(void)
+{
+  WORD wVersionRequested;  
+  WSADATA wsaData; 
+  int err; 
+  wVersionRequested = MAKEWORD(1, 1); 
+    
+  err = WSAStartup(wVersionRequested, &wsaData); 
+    
+  if (err != 0) 
+    /* Tell the user that we couldn't find a useable */ 
+    /* winsock.dll.     */ 
+    return 1;
+    
+  /* Confirm that the Windows Sockets DLL supports 1.1.*/ 
+  /* Note that if the DLL supports versions greater */ 
+  /* than 1.1 in addition to 1.1, it will still return */ 
+  /* 1.1 in wVersion since that is the version we */ 
+  /* requested. */ 
+    
+  if ( LOBYTE( wsaData.wVersion ) != 1 || 
+       HIBYTE( wsaData.wVersion ) != 1 ) { 
+    /* Tell the user that we couldn't find a useable */ 
+
+    /* winsock.dll. */ 
+    WSACleanup(); 
+    return 1; 
+  }
+  return 0; /* 0 is ok */
+}