- Part 1, better handling of subprocess and stdout to be done


mysql-test/lib/mtr_process.pl:
  - Dont redirect stdout if ActiveState perl since fork creates a new thread and not another process.
  - Change waitpid to allow for negative pid as we get on Windows, strange but 
    that is how it is. It should never create a process with pid -1 though.
  - Remove an "if" for cygwin that does not do anything.
  - Add "print" in the potentially hanging while loop in "start_reap_all"
  - Dont use "getpgrp" on windows.
  - Remove "sleep 2" in mtr_exit
  - Remove the initial ping of mysqld's in 'mysql_admin_shutdown', instead just start one 
    mysqladmin for each expected mysqld server and wait for them to return.
    Then perform the ping of the mysqld server's. Those ping's normally return immediately.