Changed to support correct building of PERFORM_DISCONNECT on Itanium.
Add CLEAN target.
We now build the Itanium version of LIB according to the release notes,
which takes care of all the error messages that were spewing out.
Reapplied $(REGMAP) that had been dropped off the Itanium compilation of
PERFORM_DISCONNECT some how.
Updated to current version of LIB.