Fix build break from last commit a3e1b27 on mono 2.4.3
Fix build break from last commit a3e1b27 on mono 2.4.3

Looks like this level of mono doesn't have a string.Join() which will take a list rather than an array (or some implicit conversion isn't happening)

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