Convert many LLSD map and array iterations to range-for syntax

indra/llcharacter/llbvhloader.cpp

indra/llcommon/llprocessor.cpp

indra/llcommon/llsdjson.cpp

indra/llcommon/llsdparam.cpp

indra/llcommon/llsdutil.cpp

indra/llcommon/lluri.cpp

indra/llinventory/llsettingsbase.cpp

indra/llinventory/llsettingsdaycycle.cpp

indra/llinventory/llsettingssky.cpp

indra/llmessage/llavatarnamecache.cpp

indra/llui/llkeywords.cpp

indra/llui/llnotifications.cpp

indra/llui/lluistring.cpp

indra/newview/llfloaterregioninfo.cpp

indra/newview/llmarketplacefunctions.cpp

indra/newview/llpipelinelistener.cpp

indra/newview/llspeakers.cpp

indra/newview/llviewermessage.cpp

indra/newview/llviewernetwork.cpp

indra/newview/tests/llviewerassetstats_test.cpp