deleted *INITIAL-POLICY* and *INITIAL-INTERFACE-POLICY*, since
they seem irrelevant in the ANSI world of 1 source
file per compile command
deleted *INITIAL-PACKAGE* for the same reason
renamed *DEFAULT-POLICY* and *DEFAULT-INTERFACE-POLICY* to
*POLICY* and *INTERFACE-POLICY*
made PROCESS-OPTIMIZE-DECL remove duplicate alist entries