Log Message:
-----------
Update URL to Ross Williams' CRC paper.
Per note from Devrim Gunduz
Modified Files:
--------------
pgsql/src/include/utils:
pg_crc.h (r1.17 -> r1.18)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/pg_crc.h?r1=1.17&r2=1.18)