MFC: r238896, r238897, r241331 (usr.bin/script/ only), r241972, r242138,
     r248388, 253814

+ Add "-f" to also output filemon(4) information.
+ Add d, p and r switches for recording script sessions with timing data
  and playing sessions back with or without time delays.
+ Remove contractions.

Approved by:	releng (glebius)