1. joinGame()
  @ bzflag/guiplaying.cxx:485
  * sets: joinRequested = true

2. handlePendingJoins()
  @ clientbase/playing.cxx:402  (from playingLoop())
  - checks for (joinRequested == true)
  - sets: joinRequested = false
  * sets: waitingDNS = true

3. dnsDoneLookup()
  @ clientbase/playing.cxx:477  (from playingLoop())
  - checks for (waitingDNS == true)
  - sets: waitingDNS = false
  * returns true if the lookup is successful,
    which causes joinInternetGame() to be called

4. joinInternetGame()
  @ clientbase/playing.cxx:269
  - creates the serverLink
  - calls serverLink->sendVarRequest()
  - calls serverLink->sendUDPlinkRequest()
  * calls sendFlagNegotiation()
  - sets: joiningGame = true

5. handleFlagNegotiation()
  @ clientbase/playing.cxx:1223
  * calls serverLink->send(MsgWantSettings, 0, NULL);

6. handleGameSettings()
  @ clientbase/playing.cxx:1244
  * calls serverLink->send(MsgWantWHash, 0, NULL);

7. handleWantHash()
  @ clientbase/playing.cxx:1263
  * calls WorldDownloader::start()

8. WorldDownLoader::loadCached()
  @ clientbase/WorldDownLoader.cxx:268
  * calls Downloads::instance().startDownloads()

9. checkForCompleteDownloads()
  @ bzflag/guiplaying.cxx:5663
  - checks Downloads::instance().requestFinalized()
  * return true if downloads are done,
    which causes joinInternetGame2() to be called

10. joinInternetGame2()
  @ bzflag/guiplaying.cxx:3909  (from playingLoop())