New postgresql crash-me file.
Increased blob size in benchmarks from 65K to 1M.


mysql-test/t/select.test:
  Added ABS() to make tests more portable
mysys/tree.c:
  Added missing call to tree->free  (MySQL didn't use this)
sql-bench/Comments/postgres.benchmark:
  Updated documentation
sql-bench/bench-init.pl.sh:
  Updated version number (changed blob size)
sql-bench/limits/pg.cfg:
  New postgres results
sql-bench/server-cfg.sh:
  Updated to PostgreSQL 7.1.1
sql-bench/test-connect.sh:
  Changed select_big -> select_big_str
tests/fork_big.pl:
  Added count(distinct) test