* Per PR147 addressed problems when reseting and inserting a timer
into a timer chain that did not honor time passage since the last
time the timer server was scheduled and the new insertion.
* include/rtems/rtems/timer.h, src/timerreset.c, src/timerserver.c,
src/timerserverfireafter.c, src/timerserverfirewhen.c: Broke up
the "reset server" routine into a set of very specific routines
that allowed the server to be unscheduled, timer chains to be
"synchronized" with the current time before inserting a new timer.
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