#2989 rde: add ability to keep active SC up in the event of split partitions

[Gary Lee]

In [#2795], we introduced the ability to select the active SC from the larger partition, in the event of split partitions. But it may be more desirable to keep the current SC active, even if it is in the smaller parition.

We should allow the user to choose which behaviour is preferred by adding a 'FMS_TAKEOVER_PRIORITISE_PARTITION_SIZE' option to fmd.conf.

[Gary Lee]

done in [#2995]