re-merge viewer-public.  has a rough edge or two, but this is closer to the snowglobe2.1 and viewer2.2 code, and beats people re-applying their viewer-public changes piecemeal while waiting for this to land.

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Reviewed by Richard.

Modified llkdu pointer for all platforms, cleaned up unused kdu-binaries references, fixed llkdu cmake to simply point to lib and build

back-out the back-out for this branch.  yay.

Backing out this merge that I pushed (prematurely) to the wrong place.

BuildParams - Use new 'build_debug_release_separately' flag for viewer-development-import and viewer-development-fixes

fix for EXT-8730: crash at llrender/llimagegl.cpp(157) : error ERROR: checkTexSize: wrong texture size and discard level: width: 512 Height: 512 Current Level:

added more debug code for EXT-6791: [crashhunters] Intel 965 Crash in glCopyTexSubImage2D

Checker: UNINIT_CTOR
Function: LLVivoxProtocolParser::LLVivoxProtocolParser()
File: /indra/newview/llvoicevivox.cpp

Port of svn changset 3458 from Snowglobe, with minor tweaks.