6729759 need to accommodate non-8-byte-aligned mutexes

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

6678310 using LD_AUDIT, ld.so.1 calls shared library's .init before library is fully relocated
6689238 libc needs global protection against ld.so.1

PSARC 2007/661 delete sched_nice
PSARC 2008/039 POSIX scheduling interfaces
6647542 POSIX scheduling should be compatible with Solaris scheduling classes

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