tests: Add tests for timers

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
lib: remove unused thread_master_debug function

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
lib: use heap to manage timers

Signed-off-by: Christian Franke <chris@opensourcerouting.org>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
zebra: Change the mechanism for comparing route ID's.

The current format uses subtraction of two ints. Unfortunately, the
subtraction method does not work for all combinations of numbers.
For example, the with numbers represented by 10.x.x.x and 192.x.x.x,
10.x.x.x - 192.x.x.x will yield a very large positive number indicating
that 10.x.x.x is larger.

Signed-off-by: Ken Williams <kenneth.j.williams@intel.com>
Acked-by: Feng Lu <lu.feng@6wind.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>