Fix @persistent@ substitution logic.

Just handle @persistent@ as a normal boolean.
On 11/05/2014 04:52 PM, Alexandre Detiste wrote:
>> @@ -42,7 +42,7 @@ endef
>>  
>>  null :=
>>  requires = $(subst ${null} ${null},\n,$(foreach schedule,$(schedules),Requires=cron-$(schedule).timer))
>> -persistent = $(if $(filter $(enable_persistent),yes),Persistent=true,\@DELETEME\@)
>> +persistent = $(if $(filter $(enable_persistent),yes),True,False)
> 
> Dwayne & myself want that systemd-cron remain compatible with systemd  v197->211 .
> This would break it


Why would it? Did I miss something?

If the value is ANDed, thus Persistent=true is not written in the final
unit.