First, the signature classname(const T*) was wrong: that function could only
accept a pointer to const T. The expression classname(someptr) where someptr
was a pointer to non-const SomeType displayed "SomeType*" because it could
only match classname(const T&), where T was SomeType*.

classname(T* const) is what we should have written, meaning "const pointer to
T" rather than "pointer to const T."

Second, the previous implementation failed to handle the case in which the
pointer was nullptr.

LLStacktrace has no behavior except when you stream an instance to a
std::ostream. Then it reports the current traceback at that point to the
ostream.

This bit of indirection is intended to avoid the boost/stacktrace.hpp header
from being included everywhere.

Fixed variadic macro usage in LL_ERRS_IF and LL_WARNS_IF and improved LLError::shouldLogToStderr() behavior under xcode.

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

In some places we want to log the same information but with different severity
depending on specifics. In other cases we need to test the availability of the
logging subsystem before engaging it. LL_VLOGS() accepts an LLError::ELevel
argument that can differ with each call, while retaining the desirable feature
of deciding only once for each level.

We've had this functionality buried in llerror.cpp for years. Make it
available for callers outside llerror.cpp too.

If the coro is given something other than a map from the http then move the return into a body section.
Changed windlight to use a coroutine and the new LLCore::Http libarary.
Extra comments into Event Polling.

SH-4577 WIP Interesting: viewer crashed when clicking a offline Conversation containing a shared object
potential fix by making instance tracker allow key collisions for LLToastNotifyPanel
changed assertion macro to use original unpreprocessed source code
renamed instance tracker behavior macros to use LL prefix
added RestoreCameraPosOnLogin setting to optionally restore old camera positioning behavior

changed unit declarations macros to make a lot more sense

made getPrimaryAccumulator return a reference since it was an
always non-null pointer
changed unit conversion to perform lazy division in order to avoid truncation
of timer values

fixed bad search and replace

added convenience types for units F32Seconds, etc.

SH-4346 FIX: Interesting: some integer Statistics are displayed as floating point after crossing region boundary
made llerrs/infos/etc properly variadic wrt tags
LL_INFOS("A", "B", "C") works, for example
fixed unit tests
remove llsimplestat

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

consolidated most indra-specific constants in llcommon under indra_constants.h
fixed issues with operations on mixed unit types (implicit and explicit)
made LL_INFOS() style macros variadic in order to subsume other logging methods
such as ll_infos
added optional tag output to error recorders

there are no samples during the time period.
added hasValue to SampleAccumulator so we don't print a value when we don't have
a single sample yet
added some disabled log output for scene load timing

BUG-2707 fix comment typos, remove unnecessary winmm_shim changes, and revert 2672 fix included only for local integ test

MAINT-2740 convert to std::string based API for OutputDebug wrapper cleanliness after sage counsel (slight refrain)