stub for eavesdrop code feature
check eavesdrop permissions on caller
stubs for checking eavesdrop target
helper for checking group's membership
check eavesdrop target & branch to `cf_eavesdrop`
update permission check to specs
branch to eavesdrop module using cf_exe:branch/2
Select right target for eavesdrop
wait until eavesdrop ends
fix pull request's issues
Merge branch 'KAZOO-2559' of https://github.com/siplabs/kazoo into siplabs-KAZOO-2559
KAZOO-2559: style and formatting, plus a little dialyzer
Merge branch 'siplabs-KAZOO-2559'