Allow user-defined service restart parameter.

This allows, for example, use of /etc/init.d/haproxy reload to restart
haproxy when config changes, which:

- includes syntax checks
- restarts without interruption to service
Add missing LICENSE file
Remove redundant params section

The parameters for 'Redhat', 'Debian' and 'Archilinux were identical
and have been merged.
Merge pull request #57 from songkick/restart-command

Allow user-defined service restart parameter.
Merge pull request #66 from toabctl/add-missing-license

Add missing LICENSE file
Merge pull request #79 from kurthuwig/remove-redundant-parameters

Remove redundant params section