BulletSim: replace use of funky nullable values for vehicle property update control (m_known* stuff). Bitmaps will be quicker to test and to clear.
BulletSim: replace use of funky nullable values for vehicle property update control (m_known* stuff). Bitmaps will be quicker to test and to clear.

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