Disallow (and don't use) space in combination names

 - Remove the "hack" from mtr.pl that skipped searching for the .dll files
  when embedded and windows. Now the variables will be preoperly initialized.
 - Make the tests detect that they can't run on windows+embedded

Remove the alignment option, let valgrind use its default

mysqladmin fails on Linux in 6.0 without --character-sets-dir
Also added timeout for server shutdown, hope this will solve it

In stead of hard-coded 8, read from $MTR_MAX_PARALLEL if set

Alt. solution: let the "InnoDB plugin" combinations apply
Added some alternative plugin paths (I need to move the code anyway)

The problem is that safe_kill_win fails to detect a dead process. OpenProcess() will 
succeed even after the process died, it will first fail after the last handle to process 
is closed.

To fix the problem, check process status with GetExitCodeProcess() and consider 
process to be dead if the exit code returned by this routine is not STILL_ALIVE.

 - Improve the report produced when a valgrind error is detected

Extract substr into local variable

with the newer pb2 testing environments

a "if"
Bug #41913 mysqltest cannot source files from if inside while
Some commands require additional processing which only works first time
Keep content for write_file or append_file with the st_command struct
Add tests for those cases to mysqltest.test

This fixes the regression introduced in 5.1 that prevents 64 bit builds on Intel while still keeping the core2 hack operational so the cluster can build.