pgsql: Reorganize our CRC source files again.

Reorganize our CRC source files again.

Now that we use CRC-32C in WAL and the control file, the "traditional" and
"legacy" CRC-32 variants are not used in any frontend programs anymore.
Move the code for those back from src/common to src/backend/utils/hash.

Also move the slicing-by-8 implementation (back) to src/port. This is in
preparation for next patch that will add another implementation that uses
Intel SSE 4.2 instructions to calculate CRC-32C, where available.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/4f700bcd20c087f60346cb8aefd0e269be8e2157

Modified Files
--------------
contrib/hstore/hstore_gist.c | 2 +-
contrib/ltree/crc32.c | 2 +-
contrib/pg_trgm/trgm_op.c | 1 +
src/backend/access/transam/twophase.c | 24 +-
src/backend/access/transam/xlog.c | 6 +-
src/backend/access/transam/xloginsert.c | 2 +-
src/backend/access/transam/xlogreader.c | 2 +-
src/backend/replication/logical/snapbuild.c | 4 +-
src/backend/replication/slot.c | 4 +-
src/backend/utils/adt/tsgistidx.c | 1 +
src/backend/utils/adt/tsquery.c | 2 +-
src/backend/utils/cache/relmapper.c | 4 +-
src/backend/utils/hash/Makefile | 2 +-
src/backend/utils/hash/pg_crc.c | 97 +++
src/bin/pg_controldata/pg_controldata.c | 2 +-
src/bin/pg_resetxlog/pg_resetxlog.c | 4 +-
src/bin/pg_rewind/pg_rewind.c | 2 +-
src/common/Makefile | 2 +-
src/common/pg_crc.c | 1252 ---------------------------
src/include/access/xlogrecord.h | 6 +-
src/include/catalog/pg_control.h | 4 +-
src/include/common/pg_crc.h | 142 ---
src/include/port/pg_crc32c.h | 49 ++
src/include/utils/pg_crc.h | 107 +++
src/port/Makefile | 2 +-
src/port/pg_crc32c_sb8.c | 1169 +++++++++++++++++++++++++
src/tools/msvc/Mkvcbuild.pm | 4 +-
27 files changed, 1464 insertions(+), 1434 deletions(-)