tree-wide: s/time-out/timeout/g

From WordNet (r) 3.0 (2006) [wn]:

  time-out
      n 1: a brief suspension of play; "each team has two time-outs left"

From The Free On-line Dictionary of Computing (18 March 2015) [foldoc]:

  timeout

     A period of time after which an error condition is raised if
     some event has not occured.  A common example is sending a
     message.  If the receiver does not acknowledge the message
     within some preset timeout period, a transmission error is
     assumed to have occured.