MAINT-8991: only escape log message characters once, add unit test
remove extra log line created by LL_ERRS
document that tags may not contain spaces

When a 'family' code isn't recognized, for instance, report the family code.
That should at least clue us in to look up and add an entry for the relevant
family code.

(transplanted from 8b0c42b1a4f0416a17c8ec6078a85c5773f69a25)

continued conversion to units system
made units perform type promotion correctly and preserve type in arithmetic
e.g. can now do LLVector3 in units
added typedefs for remaining common unit types, including implicits

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

changed Units macros and argument order to make it more clear
optimized units for integer types
fixed merging of periodicrecordings...should eliminate duplicate entries in sceneloadmonitor history

improved unit tests for LLUnit
renamed LLUnit to LLUnitImplicit with LLUnit being reserved for
explicit units

cleaning up build
moved most includes of windows.h to llwin32headers.h to disable min/max macros, etc
streamlined Time class and consolidated functionality in BlockTimer class
llfasttimer is no longer included via llstring.h, so had to add it manually in several places

simplified llfasttimer code down to 2 classes
llunit unit conversion now done in floating point or 64 bit integer precision,
depending on source type

crafted by richard

Change Linux fasttimer implementation back to RDTSC - using a reliable syscall was REALLY chewing CPU time.  Sigh.  I didn't realize how incredibly often this gets called.  So, back to the assembly.
But be more careful with CPU clock count on linux, so the fasttimer values are much more accurate than they were the last time we were with RDTSC, in absolute terms - back in the right order of magnitude anyway.

Also change many instances of Mhz to MHz.
Also some minor comment fixes.

Checker: STRING_OVERFLOW
Function: CProcessor::AnalyzeIntelProcessor()
File: /indra/llcommon/llprocessor.cpp

Refactored the CProcessor class into LLProcessorInfo.
Reviewed by brad

svn merge -r108355:109316
svn+ssh://svn.lindenlab.com/svn/linden/branches/moss/maint-viewer-12-uploadfees-qa108314

Whew.

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

dataserver-is-deprecated

merge -r 87067:87077 svn+ssh://svn.lindenlab.com/svn/linden/branches/maint-render/maint-render-4-merge -> release. dataserver-is-deprecated.