The new option positioning.filter.cp-reset-distance allows to disable
the filter when the unfiltered location of the mobile terminal is found
to be close enough to a capture point.
The new configuration option positioning.filter.max-speed allows to
specify the maximum speed at which the mobile terminals can travel; the
distance between two results for a given mobile will be limited to the
distance that it could have travelled, according to the two requests'
timestamps.