Factor out argv splitting into rad_expand_xlat
Remove quotes from quoted argv entries
rlm_rediswho: fix trim functionality

(query result is not available after redis_finish_query has been called)
rlm_rediswho: initialize rcode for Accounting-On and Accounting-Off requests
rlm_redis_query now splits the query into separate arguments and expands
each one individually.

This allows for both string literals and expansions to contain spaces, e.g.

    %{redis:LPUSH 'my key' %{User-Name}}