Clean up a bunch of bad LLSD loop usage

indra/llcharacter/llbvhloader.cpp

indra/llcommon/llmetricperformancetester.cpp

indra/llcommon/llmetrics.cpp

indra/llcommon/llprocessor.cpp

indra/llcommon/llsdjson.cpp

indra/llcommon/llsdparam.cpp

indra/llcommon/llsdserialize.cpp

indra/llcommon/llsdserialize_xml.cpp

indra/llcommon/llsdutil.cpp

indra/llcommon/lluri.cpp

indra/llmessage/llavatarnamecache.cpp

indra/llmessage/llcachename.cpp

indra/llmessage/llexperiencecache.cpp

indra/llmessage/llfiltersd2xmlrpc.cpp

indra/llmessage/lliohttpserver.cpp

indra/llui/llkeywords.cpp

indra/llui/llmultislider.cpp

indra/llui/llnotifications.cpp

indra/llui/lluistring.cpp

indra/llxml/llcontrol.cpp