write: make timestamp to be obviously just a clock time

write: make timestamp to be obviously just a clock time

By looking the code one will had hard time knowing that a slice of ctime()
from characters 11 to 16 is HH:MM time format.  Use of strftime("%H:%M")
makes this a lot less mysterious.

In same go make \007 hex printouts to be \a that is the same thing: alarm.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>