Description:
------------
strtotime() should be able to parse "midnight" and "noon".


Reproduce code:
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echo strtotime("midnight");
echo strtotime("noon");


Expected result:
----------------
echo strtotime("midnight");
  should print the time stamp for the next midnight
  (midnight tomorrow).

echo strtotime("noon");
  should print the time stamp for the next noon
  (noon today/tomorrow depending on the current time).

echo strtotime("12:00 am");
echo strtotime("12 am");
echo strtotime("12:00 pm");
echo strtotime("12 pm");
  all do the correct things.


Actual result:
--------------
echo strtotime("midnight");
  returns -1.

echo strtotime("noon");
  returns -1.