As of Radio 8.0.7 (26 March 2002)

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methodName: xmlStorageSystem.getServerCapabilities
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==REQUEST

Params:
     (1) int - user number
     (2) string - password (md5'd?)
     
==RESPONSE

Params:
     struct - capabilities struct
     
Capabilities Struct
     community
         struct (community struct)
     ctBytesInUse
         int (same as ping reply)
     flError
         boolean
     legalFileExtensions
         array of strings (extensions without the .)
     maxBytesPerUser
         int
     maxFileSize
         int
     message
         String ("Hello again!")
     staticUrls
         struct (static urls struct)
     urlRankingsByPageReads
         String (URL to stats page)
     urlReferers
         String (URL to referers page, if usernum is appended to URL)
     urlSpamFreeMailto
         String (URL to mailto form, if ("?usernum=" + usernum) is appended to URL. Here's to consistency! :))
     urlWeblogUpdates
         String (URL to RCS "recently updated' page)
     webBugUrl
         String (URL to 1x1 transparent gif, which is a really silly way to track hits and referrers)
     weblogUpdates
         struct (weblog updates 2 struct (yay for consistency again))
     yourUpstreamFolderUrl
         String (same as in ping reply)
         
Community Struct:
     discussionGroupsUrl
         String (URL in "support" sidebar on desktop website homepage)
     domainName
         String (full server name of RCS host)
     flCanHostComments
         boolean
     flPublic
         boolean
     mailListUrl
         String (URL in "support" sidebar on desktop website homepage)
     name
         String (UserLand in this case. Support again?)

Static URLs Struct:
     rssHotList
         struct (rss hotlist struct)
     weblogUpdates
         struct (weblog updates 1 struct)
         
RSS Hotlist Struct
     hotlistOpml
         String (URL)
         
Weblog Updates Struct 1 (from Static URLS struct)
    (all values are Stringed URLs)
     changesOpml
     changesrssXml
     changesXml
     europeHtml
     europeOpml
     europerssXml
     europeXml
     indexHtml
     rssHtml
     rssOpml
     rssrssXml
     rssXml
     useragentsXml
    
Weblog Updates Struct 2 (from Capabilities struct)
     (I'm not sure what this is. Mine says "subhonker6", but I haven't captured any packets going from radio
     to subhonker6. Subhonker7 gets the weblogStats.ping request))
     port
         int
     protocol
         String ("xml-rpc")
     rpcPath
         String ("/RPC2")
     server
         String (server name)