Only ship in $PATH custom scripts that we intend users to run
Originally created by @intrigeri on #10658 (Redmine)
/usr/local/*bin contains lots of helper scripts that users should not
be tempted to run. They should go to /usr/local/lib. Now we won’t have
anything serious to forward-port from Wheezy to Jessie anymore, we’ll be
testing feature/jessie a lot for 2 months, so perhaps it’s the good time
to do it in feature/jessie. Not a blocker though.
Feature Branch: feature/10658-clean-up-path