Change substring matching to prefix matching in region search. This affects both map and login, as they use the same method.
Change substring matching to prefix matching in region search. This affects
both map and login, as they use the same method.

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