Change: Guard acl from being evaluated on windows
Change: Guard acl from being evaluated on windows

def.cf_runagent_shell is not used on windows, and having the acl in
place produces unwanted event log entries.

Ref: https://dev.cfengine.com/issues/6555

phnakarin/masterfiles,frap/masterfiles-1,martingehrke/masterfiles,martingehrke/masterfiles,frap/masterfiles-1,maciejmrowiec/masterfiles,martingehrke/masterfiles,phnakarin/masterfiles,maciejmrowiec/masterfiles,maciejmrowiec/masterfiles,phnakarin/masterfiles,frap/masterfiles-1