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.