account_path_suffix
Description:
The suffix of the account object path such as "gabble/jabber/chris_40example_2ecom0" for the account whose object path is ACCOUNT_OBJECT_PATH_BASE + "gabble/jabber/chris_40example_2ecom0".
The same as returned by get_path_suffix.
It is given by the AccountManager in the connection parameters. Or null
if the ConnectionManager or the AccountManager are too
old.