Merged oacs-5-6 to HEAD. HEAD now installs and passes all core tests. There may still be some lingering problems due to my screwing up the oacs-5-6 branch earlier, I'll be looking into this later.
Finished up PG semantics for global/instance parameters on package upgrade. The Tcl API stuff to do this should technically be moved down into the oracle/PG API but 1) it's a fair amount of db-specific work and 2) people should be using the high level constructs in the first place (and why do people explicitly register new parameters when they're registered from the package info file on upgrade in the first place?)