BOINC network/cpu times

[Ageless]

As reported by Markj at the BOINC Dev forums:

When I set the "network usage allowed" times they don't seem to work with certain
combinations.

In boingmgr -> advanced -> preferences and click on the network usage tab (also does
this for processor usage). Select time examples as below, click the okay button.
Reselect and they have changed.

06:20/22:20 becomes 06:19/22:19.
06:35/22:35 becomes 06:34/22:34.
06:50/22:50 becomes 06:49/22:49.

The times are stored in decimal, when they are converted back to a time they are not
shown correctly.

06:20 is stored as 6.333333 and when it converts from decimal back to a time it 
stuffs them up (ie .333333 x 60 mins = 19.999998) so it shows as 06:19.

See global_pref_override.xml exerpt below. I have seen this using BOINC versions 
5.10.30 and 5.10.45 under Windows.

<global_preferences>
<run_on_batteries>0</run_on_batteries>
<run_if_user_active>0</run_if_user_active>
<idle_time_to_run>3.000000</idle_time_to_run>
<start_hour>0.000000</start_hour>
<end_hour>0.000000</end_hour>
<net_start_hour>6.333333</net_start_hour>
<net_end_hour>22.333333</net_end_hour>