various fixes (for mysql-test-run at least):
  * accept --no-defaults
  * 4.0 compatible password handling (only it no other argumensts, only if doesn't start with --)
ps_3innodb.test:
  only run ps_3innodb.test if innodb is present
mysql-test-run.sh:
  it's --verbose, not --verbose=1


mysql-test/mysql-test-run.sh:
  it's --verbose, not --verbose=1
mysql-test/t/ps_3innodb.test:
  only run ps_3innodb.test if innodb is present
scripts/mysql_fix_privilege_tables.sh:
  various fixes (for mysql-test-run at least):
  * accept --no-defaults
  * 4.0 compatible password handling (only it no other argumensts, only if doesn't start with --)