Add some additional comments about environment variables

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546145 13f79535-47bb-0310-9956-ffa450edef68
Add halt alias to system:shutdown -h -f

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546146 13f79535-47bb-0310-9956-ffa450edef68
Fix a typo mistake in the time argument description of the shutdown command.

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546147 13f79535-47bb-0310-9956-ffa450edef68
[KARAF-2511] Review of the start-stop page of the documentation

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546148 13f79535-47bb-0310-9956-ffa450edef68
[KARAF-2511] Fix typo mistake in archetype page of the documentation

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1546149 13f79535-47bb-0310-9956-ffa450edef68