[s-xml-rpc-devel] Added some introspection

Hi, I've added system.listMethods, system.methodHelp (and a dummy system.methodSignature) to s-xml-rpc. I've also created a "secure by default" package that contains only these three methods and bound *xml-rpc-package* to this -- we don't want to export the whole common-lisp package by default, I think. I've also added a ChangeLog file to record my misdeeds. Next up: system.multicall! Cheers, Rudi