Fix several bugs preventing TID requests from functioning.

Fix several bugs preventing TID requests from functioning.

 - Partial implementation of config file print for debug
 - Fix a few possibly unitialized values
 - Pass TRPS_INSTANCE to tids event for route lookups
 - Return 0 on success from tr_tids_req_handler()
 - Return null on no match from trp_rtable_get_selected_entry()