Make the period for the uip-ds6 periodic task configurable
Rename as suggested by g-oikonomou
Merge branch 'master' of git://github.com/contiki-os/contiki into ds6_period_configurable
Merge branch 'master' of git://github.com/contiki-os/contiki into ds6_period_configurable
Merge pull request #560 from jdede/ds6_period_configurable

Make the period for the uip-ds6 periodic task configurable