Fixes bug #5588. Additions after merge from 4.0.

sql-common/client.c:
  Fixes bug #5588. checks if operation was timed out.
vio/vio.c:
  Added vio_was_interrupted() function references to detect timed out
  operation properly on win32.
vio/vio_priv.h:
  Added vio_ssl_was_interrupted() function that detects timed out
  operation properly on win32.
vio/viosocket.c:
  Minor changes to follow up the coding standard.
vio/viossl.c:
  Added vio_ssl_was_interrupted() function that detects timed out
  operation properly on win32.

sql-common/client.c

@@ -602,7 +602,7 @@ net_safe_read(MYSQL *mysql)
     DBUG_PRINT("error",("Wrong connection or packet. fd: %s  len: %d",
 			vio_description(net->vio),len));
 #ifdef MYSQL_SERVER
-    if (vio_errno(net->vio) == SOCKET_EINTR)
+    if (vio_was_interrupted(net->vio))
       return (packet_error);
 #endif /*MYSQL_SERVER*/
     end_server(mysql);

vio/vio.c

@@ -50,6 +50,7 @@ void vio_reset(Vio* vio, enum enum_vio_type type,
     vio->fastsend	=vio_fastsend;
     vio->viokeepalive	=vio_keepalive;
     vio->should_retry	=vio_should_retry;
+    vio->was_interrupted=vio_was_interrupted;
     vio->vioclose	=vio_close_pipe;
     vio->peer_addr	=vio_peer_addr;
     vio->in_addr	=vio_in_addr;
@@ -69,6 +70,7 @@ void vio_reset(Vio* vio, enum enum_vio_type type,
     vio->fastsend	=vio_fastsend;
     vio->viokeepalive	=vio_keepalive;
     vio->should_retry	=vio_should_retry;
+    vio->was_interrupted=vio_was_interrupted;
     vio->vioclose	=vio_close_shared_memory;
     vio->peer_addr	=vio_peer_addr;
     vio->in_addr	=vio_in_addr;
@@ -88,7 +90,7 @@ void vio_reset(Vio* vio, enum enum_vio_type type,
     vio->fastsend	=vio_ssl_fastsend;
     vio->viokeepalive	=vio_ssl_keepalive;
     vio->should_retry	=vio_ssl_should_retry;
-    vio->was_interrupted=vio_was_interrupted;
+    vio->was_interrupted=vio_ssl_was_interrupted;
     vio->vioclose	=vio_ssl_close;
     vio->peer_addr	=vio_ssl_peer_addr;
     vio->in_addr	=vio_ssl_in_addr;

vio/vio_priv.h

@@ -39,6 +39,8 @@ int vio_ssl_fastsend(Vio *vio);
 int vio_ssl_keepalive(Vio *vio, my_bool onoff);
 /* Whenever we should retry the last read/write operation. */
 my_bool vio_ssl_should_retry(Vio *vio);
+/* Check that operation was timed out */
+my_bool	vio_ssl_was_interrupted(Vio *vio);
 /* When the workday is over... */
 int vio_ssl_close(Vio *vio);
 /* Return last error number */

vio/viosocket.c

@@ -197,9 +197,9 @@ vio_should_retry(Vio * vio __attribute__((unused)))
 
 
 my_bool
-vio_was_interrupted(Vio * vio __attribute__((unused)))
+vio_was_interrupted(Vio *vio __attribute__((unused)))
 {
-  int en = socket_errno;
+  int en= socket_errno;
   return (en == SOCKET_EAGAIN || en == SOCKET_EINTR ||
 	  en == SOCKET_EWOULDBLOCK || en == SOCKET_ETIMEDOUT);
 }

vio/viossl.c

@@ -184,6 +184,15 @@ vio_ssl_should_retry(Vio * vio __attribute__((unused)))
 }
 
 
+my_bool
+vio_ssl_was_interrupted(Vio *vio __attribute__((unused)))
+{
+  int en= socket_errno;
+  return (en == SOCKET_EAGAIN || en == SOCKET_EINTR ||
+	  en == SOCKET_EWOULDBLOCK || en == SOCKET_ETIMEDOUT);
+}
+
+
 int vio_ssl_close(Vio * vio)
 {
   int r;