QPID-4738: Add "qpid-ha status --all" option.

Show status of all cluster members.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1467053 13f79535-47bb-0310-9956-ffa450edef68
QPID-4733: Fix windows problem introduced by installation of init scripts

Do init script installation conditional on UNIX only.
SYSCONF_INSTALL_DIR is not set on windows.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1467054 13f79535-47bb-0310-9956-ffa450edef68