changing config does not entirely take effect.

[Jay R. Wren]

related: https://bugs.launchpad.net/ubuntu/+source/haproxy/+bug/1477198

using 1.5.10-1~0.IS.14.04.0 from `deb http://archive.admin.canonical.com/ubuntu trusty-cat-haproxy main` and haproxy juju charm configured with source to that apt list line.

The charm uses `service haproxy reload` on charm config-changed. The deb haproxy package init.d script uses haproxy -sf, but the pids listed as -sf arguents are not finishing and exiting. They continue to service requests with the old haproxy config.