-Add support for detecting version and features from mysqld binary
 - Autodetect netware
 - Disable some features not available below 5.0
 - Cleanup executable_setup to look for one executable at a time, only llok for the ones that are needed based on the selected testcases and settings


mysql-test/lib/mtr_cases.pl:
  Backport from 5.1
mysql-test/lib/mtr_io.pl:
  Backport from 5.1
  Add new function mtr_appendfile_to_file
mysql-test/lib/mtr_misc.pl:
  Backport from 5.1
mysql-test/lib/mtr_process.pl:
  Backport from 5.1
mysql-test/lib/mtr_report.pl:
  Backport from 5.1
mysql-test/mysql-test-run.pl:
  Add support for detecting version and features from mysqld binary
  Autodetect netware
  Disable some features not available below 5.0
  Cleanup executable_setup to look for one executable at a time, only llok for the ones that are needed based on the selected testcases and settings
mysql-test/r/mysqltest.result:
  Update result
mysql-test/lib/mtr_im.pl:
  New BitKeeper file ``mysql-test/lib/mtr_im.pl''
mysql-test/lib/mtr_stress.pl:
  New BitKeeper file ``mysql-test/lib/mtr_stress.pl''