Update port to version 0.6. This adds a sysctl "hw.est_verbose"
which controls whether frequency changes are logged, and converts
the rc.d script to use the rcNG framework.
Note that the module will now only load if 'est_enable="YES"'
appears in rc.conf, rc.conf.local, or rc.conf.d/est.
PR: ports/71269
Submitted by: Colin Percival <cperciva@daemonology.net>
