- Complete rewrite of EN_setlinktype with link index argument passed by reference
- New unit test of EN_setlinktype added
- New function EN_setlinknodes added
A bug in the delete function in hash.c was preventing the unit test of the new set ID API functions from running properly. In fixing this bug the entire hash table code was refactored to make it look more like the mempool service routines. Also the need to copy the string passed into the table's insert function was eliminated.
