Merge branch 'main' of https://github.com/secondlife/viewer

.github/workflows/build.yaml

.github/workflows/cla.yaml

.github/workflows/stale.yaml

build.sh

doc/contributions.txt

indra/llcommon/classic_callback.h

indra/llcommon/llapp.cpp

indra/llcommon/llapp.h

indra/llcommon/llcoros.cpp

indra/llcommon/lldictionary.h

indra/llcommon/llpointer.h

indra/llcommon/llrand.cpp

indra/llcommon/llrefcount.cpp

indra/llcommon/llrefcount.h

indra/llcommon/llsd.h

indra/llcommon/llsdserialize.cpp

indra/llcommon/llsdserialize_xml.cpp

indra/llcommon/llstring.cpp

indra/llcommon/llsys.cpp

indra/llcommon/llthread.cpp