Merge viewer-release 6.3.6 into viewwer-eep repo

.hgtags

autobuild.xml

indra/cmake/Variables.cmake

indra/llcharacter/llgesture.cpp

indra/llcommon/llcoros.cpp

indra/llimage/llimage.cpp

indra/llmath/llvolume.cpp

indra/llmessage/lldatapacker.cpp

indra/llmessage/llmail.cpp

indra/llmessage/llmessagetemplate.cpp

indra/llmessage/lltemplatemessagebuilder.cpp

indra/llmessage/lltemplatemessagereader.cpp

indra/llmessage/llxfer.cpp

indra/llmessage/message.h

indra/llplugin/llpluginprocesschild.cpp

indra/llprimitive/llprimitive.cpp

indra/llprimitive/lltextureanim.cpp

indra/llui/llurlentry.cpp

indra/llui/llview.cpp

indra/llwindow/llmousehandler.cpp