STABLE14-rx-send-error-code-propagation-20050915

STABLE14-rx-send-error-code-propagation-20050915

* add a version of rxi_DebugPrint for Windows that uses OutputDebugString

* migrate all printf statements to the dpf macro

* stop masking the errors from rx_sendmsg() so that higher level functions
  can make decisions based upon the failure.

* Windows reports EHOSTUNREACHABLE.  Similar to Linux, if it is reported
  reset the send packet start time to 0 in order to immediately cause the
  server to be marked down.

(cherry picked from commit 9ac9185b0feb87eff820963f83a6c861c49bdab5)