replace llinfos, lldebugs, etc with new LL_INFOS(), LL_DEBUGS(), etc.

removed LLThreadLocalSingleton
collapsed all thread recorder classes to single type, LLTrace::ThreadRecorder
moved fasttimer stack head to llthreadlocalsingletonpointer via ThreadRecorder

fixed copy construction of Recorders, eliminated most zero-length frames
fixed reset behavior of periodic recordings and extendable recordings to clear entire
history
removed busy-loop recording of stats from worker threads...stats reported only when work is done

fixed trace data gathering and routing from background thread
simplified slave->master thread communication (eliminated redundant recording and proxy object)
improved performance of fast timer data gathering (slow iterators)

fixed units conversion so that trace getters return convertable units
removed circular dependencies from lltrace*
converted more stats to lltrace

renamed LLTrace::ThreadTrace to LLTrace::ThreadRecorder
renamed LLTrace::Sampler to LLTrace::Recording

cleaned up API
samplers are now value types with copy-on-write buffers under the hood
removed coupling with LLThread

created separate constructor for static allocation of sampler buffer
fixed start/stop/resume semantics of samplers and added sampler time interval tracking

slave threads now pushing data to master thread

SH-2652 WIP -- Add timers to relevant areas, pause render pipeline while occlusion queries from previous frame are still pending and perform texture decode work.

EXT-7399: FIXED: 2.0.2 with http textures loads textures slower than 1.23.5

and possible fix for EXT-5704: FPS drop, and this could be cause freez and crash.

and possible fix for EXT-5704: FPS drop, and this could be cause freez and crash.

* Fixed bug in llqueuedthread.cpp causing unnecesssary sleeeping
* Fixed an issue that was preventing retries on 503 errors
* Added number of pending creates to Texture View
* Increased time allocated for texture creates

Also a fix for texture purging when reducing the cache size.

ignore-dead-branch

Merge latest 1.26 into trunk

Result of svn merge -r107256:107258 svn+ssh://svn/svn/user/phoenix/license_2009_merge into trunk. QAR-1165

Result of svn merge -r71162:71205 svn+ssh://svn/svn/linden/branches/new-license into release. only changes files which are not deployed or the comments section of code.