r22834: fixed a memory leak in the torture_open_connection() code, and removed

r22834: fixed a memory leak in the torture_open_connection() code, and removed
the duplicate handling of the unclist. This now exposes a function
torture_get_conn_index() which can be used by tests to work out which
host to talk to using the unclist. I will be using that as part of a
set of tests for clustered Samba that need to do auto-reconnect (to
allow testing of cluster node failure)
(This used to be commit b505c176a8d90e406fbf9a94840267d1d9dc34c6)