Use WSTRINGIZE(), LL_TO_WSTRING(), wstringize() to produce required wide
strings. Use a lambda for callback that sends log file; use LLDir, if set, to
find the log file.

Introduce BUGSPLAT CMake variable to allow suppressing BugSplat.
Make BUGSPLAT CMake variable set LL_BUGSPLAT for C++ compilations.

Set viewer version macros on llappviewerwin32.cpp, llappviewerlinux.cpp and
llappdelegate-objc.mm -- because BugSplat needs the viewer version data, and
because the macOS BugSplat hook is engaged in an Objective-C++ function we
override in the app delegate.

Streamline convenience overload stringize(std::wstring); make convenience
overload wstringize(std::string) symmetrically convert from UTF-8 string.

Also eliminate STRINGIZE() et al. dependency on Boost.Phoenix: use lambdas
instead.

Using lambdas instead of template expansion necessitates reordering some code
in wrapllerrs.h.

Also use existing LL_TO_STRING() macro to stringize LL_VIEWER_CHANNEL in
llversioninfo.cpp and its tests.

No C++ source in llcommon references any of the BugSplat code.

Automated merge with https://bitbucket.org/nat_linden/viewer-maint-8397 to pick up debugging config changes

pull in new version of Dullahan (1.1.1080) built against CEF (3325.1750.gaabe4c4) and with the host process reaper enabled

Replace start page for media browser with DuckDuckGo.com - Google page was offset  at that window size and was irritating

Now CEF supports setting default page background if specifier missing from HTML, set default background color to the Linden default grey (#282828)

Pull in newer version of Dullahan (1.1.1050) that is built against newer version of CEF (3282.1741.gcd94615)

Built from lindenlab/viewer-manager-maint

Speculative fix for MAINT-8250 Popups can appear in an unnamed new window external of the viewer.  Note: This was a fix for a threading issue in Dullahan that caused clicking on links with target of 'new' to crash.  I think it's the same issue here and manifests itself as CEF creating a new OS window.

Fixes for: MAINT-8244 Text in CEF cannot be selected with the mouse. MAINT-8245 Expose CEF log file and logging severity to viewer and MAINT-8246 Expose the CEF remote debugging system to the viewer

Fix for: MAINT-8138 Generate new page of test URLs for Dullahan that are more complete and more robust (last stage was creation of S3 non-user specific URL)

MAINT-8232 Clear History button description should not include 'web' - incorrect assertionm that web cache not cleared

including safety checks and some refactoring

Bring in the very latest version of Dullahan (1.1.1024) that matches the most recent canonical Dullahan and also bump the CEF plugin version in preparation for the RC build

After reforking the post-viewer64, viewer-release repository, I pulled in all the changes from my viewer64 based viewe64-bugsplat repository. This repository is the canonical one going forwards