merge -r62831:64079 branches/maintenance to release

doc/contributions.txt

indra/llcharacter/llmotioncontroller.cpp

indra/llcommon/llapr.h

indra/llcommon/llavatarconstants.h

indra/llcommon/llchat.h

indra/llcommon/lldefs.h

indra/llcommon/llfile.cpp

indra/llcommon/llmortician.cpp

indra/llcommon/llprocessor.cpp

indra/llcommon/llsd.cpp

indra/llcommon/llsdserialize_xml.cpp

indra/llcommon/llsdutil.cpp

indra/llcommon/llstreamtools.cpp

indra/llcommon/llstring.cpp

indra/llcommon/llstring.h

indra/llcommon/lluri.cpp

indra/llcommon/lluri.h

indra/llcommon/string_table.h

indra/llcommon/timer.h

indra/llcommon/timing.cpp