merge changes for 5.0.5-release

.hgtags

doc/contributions.txt

indra/llcommon/CMakeLists.txt

indra/llcommon/lleventfilter.cpp

indra/llcommon/lleventfilter.h

indra/llcommon/llsingleton.cpp

indra/llcommon/llstring.h

indra/llcommon/lluri.cpp

indra/llcommon/lluri.h

indra/llcommon/tests/listener.h

indra/llcommon/tests/lleventfilter_test.cpp

indra/llinventory/llparcel.h

indra/llmessage/llregionflags.h

indra/llmessage/message_prehash.cpp

indra/llmessage/message_prehash.h

indra/llprimitive/lldaeloader.cpp

indra/llui/llnotifications.cpp

indra/llui/lltextbase.cpp

indra/llui/lltextbase.h

indra/llui/llurlentry.cpp