Add flag to configuration to disable/enable Bluedot "cleanup"

[beave]

If multiple Sagans are running, they can all try to "clean up" the cache tables, which leads to a possible race condition.

The easy fix is to have a configuration flag that tells "which" Sagan will be doing the cleanups, and the other Sagan's ignore cleanup routines.

[beave]

If the shared memory already exsits, validate the size before starting. Two different Sagan's with two different sizes might be leading to faults when running a lot of Sagan's.