Fixes #4975: Windows clients may run the execRun command several times - for cygwin and plain windows cases
Merge pull request #401 from jooooooon/bug_4975/windows_clients_may_run_the_execrun_command_several_times_for_cygwin_and_plain_windows_cases

Fixes #4975: Windows clients may run the execRun command several times -...
Merge branch 'branches/rudder/2.6' into branches/rudder/2.9

Conflicts:
	initial-promises/node-server/common/1.0/site.cf
	techniques/system/common/1.0/failsafe.st
	techniques/system/common/1.0/site.st