Redmine#5709: on Windows, set mem_free and mem_total to 0

(cherry picked from commit d44523e7427383880aece4b182d9a6a59a066909)
Redmine#5829,#5830: remove the check for registered chkconfig and do not stop unnecessarily

(cherry picked from commit e0ab4efc943d6bd3007a9d6a89e9a9a7255fafe1)

Conflicts:
	lib/3.7/services.cf