Using exec in stunnel wrapper script (#110)
Using exec in stunnel wrapper script (#110)

The wrapper script was previously creating a child process which messed 
up our signal trapping. Running `exec` should replace the current process 
with `bin/start-pgbouncer` which will trap kill signals and not exit until all 
of the child processes have exited.

The issue was that the wrapper script was creating `bin/start-pgbouncer` as 
a child process and not trapping any signals. Without the wrapper script 
`bin/start-pgbouncer` will trap signals, forward them to children, and wait 
until they have all exited cleanly before dying.
heroku/heroku-buildpack-pgbouncer