Changes to track haproxy service

Changes seem to merge cleanly. As you can tell, the changes are not very big.

$ git merge master
Auto-merging templates/keepalived_instance.erb
Merge made by the 'recursive' strategy.
 README                            | 15 ++++++++++++---
 templates/global_config.erb       |  5 +++++
 templates/keepalived_instance.erb |  6 +++---
 3 files changed, 20 insertions(+), 6 deletions(-)