PSARC 2008/309 expunge synonyms.h
6700179 expunge synonyms.h

PSARC/2007/634 More compatibility with GNU gettext in gettext(3c)
6570425 gettext(3c) should support GNU gettext mo format version 1.0

6362982 namespace pollution/protection in libc
6369040 there should be but one synonyms.h file outside of libc

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