Hack in temporary permission stuff for remote nodes. Accounts are now
driven by new field in the project table called pcremote_ok, which is the set of remote node types that a project is allowed to have accounts on. When a node of that type checks in, match its type against the project table, and return accounts for everyone in all of the projects with that type listed in pcremote_ok. Kill the NOSHAREDEXPTS ifdefs in doaccounts since that stuff is dead for now.
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