refactor: route the final scene backup through the same code that handles periodic backup
refactor: route the final scene backup through the same code that handles periodic backup

This is rather than making unnecessary duplicate checks that the SOG later performs again.

QuillLittlefeather/opensim-1,ft-/opensim-optimizations-wip-tests,RavenB/opensim,ft-/opensim-optimizations-wip-extras,Michelle-Argus/ArribasimExtract,OpenSimian/opensimulator,Michelle-Argus/ArribasimExtract,TomDataworks/opensim,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,justinccdev/opensim,OpenSimian/opensimulator,OpenSimian/opensimulator,ft-/arribasim-dev-tests,bravelittlescientist/opensim-performance,ft-/arribasim-dev-extras,Michelle-Argus/ArribasimExtract,QuillLittlefeather/opensim-1,ft-/arribasim-dev-extras,ft-/opensim-optimizations-wip,TomDataworks/opensim,ft-/arribasim-dev-extras,BogusCurry/arribasim-dev,TomDataworks/opensim,QuillLittlefeather/opensim-1,rryk/omp-server,ft-/arribasim-dev-tests,ft-/opensim-optimizations-wip,Michelle-Argus/ArribasimExtract,justinccdev/opensim,justinccdev/opensim,ft-/arribasim-dev-tests,RavenB/opensim,ft-/opensim-optimizations-wip-extras,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,rryk/omp-server,OpenSimian/opensimulator,RavenB/opensim,ft-/opensim-optimizations-wip-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,BogusCurry/arribasim-dev,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,BogusCurry/arribasim-dev,QuillLittlefeather/opensim-1,BogusCurry/arribasim-dev,bravelittlescientist/opensim-performance,bravelittlescientist/opensim-performance,ft-/opensim-optimizations-wip-tests,ft-/opensim-optimizations-wip-tests,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,TomDataworks/opensim,QuillLittlefeather/opensim-1,Michelle-Argus/ArribasimExtract,rryk/omp-server,Michelle-Argus/ArribasimExtract,RavenB/opensim,ft-/arribasim-dev-tests,ft-/opensim-optimizations-wip,RavenB/opensim,TomDataworks/opensim,ft-/opensim-optimizations-wip-tests,M-O-S-E-S/opensim,ft-/opensim-optimizations-wip-extras,justinccdev/opensim,ft-/arribasim-dev-extras,M-O-S-E-S/opensim,TomDataworks/opensim,rryk/omp-server,M-O-S-E-S/opensim,OpenSimian/opensimulator,bravelittlescientist/opensim-performance,bravelittlescientist/opensim-performance,ft-/opensim-optimizations-wip-extras,ft-/arribasim-dev-tests,ft-/opensim-optimizations-wip-extras,M-O-S-E-S/opensim,M-O-S-E-S/opensim,rryk/omp-server,QuillLittlefeather/opensim-1,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,EriHoss/OpenSim_0.8.2.0_Dev_LibLSLCC,QuillLittlefeather/opensim-1,OpenSimian/opensimulator,OpenSimian/opensimulator,justinccdev/opensim,M-O-S-E-S/opensim,ft-/arribasim-dev-tests,rryk/omp-server,TomDataworks/opensim,justinccdev/opensim,RavenB/opensim,ft-/opensim-optimizations-wip,BogusCurry/arribasim-dev,M-O-S-E-S/opensim,BogusCurry/arribasim-dev,ft-/arribasim-dev-extras,bravelittlescientist/opensim-performance,RavenB/opensim,ft-/arribasim-dev-extras