Merge branch 'refs/heads/t/afh-preserve'

A single patch which adds --preserve to para_afh.

* refs/heads/t/afh-preserve:
  afh: Implement --preserve.

diff --cc NEWS.md
index 1aca9b0ae4825e295344c9dc29634785b79bcad3,55ef3be947ee76d6b0937b33988b0cd960c0e985..d8813b3f3e484a27bf06593826162923d020e996
--- 1/NEWS.md
--- 2/NEWS.md
+++ b/NEWS.md
@@@ -1,16 -1,6 +1,19 @@@
  NEWS
  ====
  
 +----------------------------------------------
 +0.6.3 (to be announced) "generalized activity"
 +----------------------------------------------
 +
 +- The ff command now accepts a negative argument to instruct the
 +  virtual streaming system to jump backwards in the current audio
 +  stream. The old syntax (e.g., "ff 30-") is still supported but it
 +  is deprecated and no longer documented. The compatibility code is
 +  sheduled for removal after 0.7.0.
 +
++- para_afh: New option: --preserve to reset the modification time to
++  the value of the original file after meta data modification.
++
  --------------------------------------
  0.6.2 (2018-06-30) "elastic diversity"
  --------------------------------------