Clean up Comments in BuildParams; Replace explicit upload locations with "public_build" policy.

BuildParams

 # BuildParams
 #
 # Please refer to:
-#  https://wiki.lindenlab.com/wiki/Parabuild_with_Mercurial#How_Build_Parameters_Work
+#  https://wiki.secondlife.com/wiki/Automated_Build_System
 
 # Global setting for now...
 Darwin.symbolfiles = "newview/Release/secondlife-symbols-darwin.tar.bz2"
 CYGWIN.symbolfiles = "newview/Release/secondlife-symbols-windows.tar.bz2"
 Linux.symbolfiles = "newview/secondlife-symbols-linux.tar.bz2"
 
-# Public Upload Locations overriding the default private ones
-S3PROXY_URL = http://automated-builds-secondlife-com.s3.amazonaws.com/
-S3INTERNAL_URL = http://automated-builds-secondlife-com.s3.amazonaws.com/
-S3GET_URL = http://automated-builds-secondlife-com.s3.amazonaws.com/
-S3PUT_URL = https://s3.amazonaws.com/automated-builds-secondlife-com/
-S3ACL = public-read
+# Use Public Upload Locations
+public_build = true
 
 # Update Public Inworld Build Status Indicators
 email_status_this_is_os = true
@@ -27,7 +23,6 @@ viewer-development.show_changes_since = 2-1-release
 
 # Build Settings
 viewer-development_coverity.coverity_product = viewer
-
 viewer-development.build_debug_release_separately = true
 
 # Notifications - to configure email notices, add a setting like this: