add spider reply even on g_errno now with an error
code of EINTERNAL error in the spider reply.
no longer just sit on the lock. this was blocking
an entire ip when just lock sitting for 3 hrs.
and only do read rate timeouts if there was at least
one byte read. this was causing diffbot reply to
read rate timeout after just 60 seconds even though
its timeout was specified as 90 seconds.