[Nut-upsdev] [networkupstools/nut] Improve upssched example in documentation (#293) (fwd)

[Roger Price]

moving to 2.7.6 to ease 2.7.5 release, while waiting for feedback

Issue 293 https://github.com/networkupstools/nut/issues/293 is due to my
misunderstanding of the upssched timers. I wrongly assumed that they were
files. I now understand that they are in-memory, and that the
documentation will explain this.

Whether that clarification is 2.7.5 or 2.7.6 is not important, since I see
very little nut user interest in timers in the user mailing list.

Is there any other user of upssched timers?

Roger