Code review comment for lp:~widelands-dev/widelands/net-user-type

* I assume that "BOT" was intended for chat or game Bots (we have/had some on irc, do we?)

* A first review of the diffs shows me no obvious Issues, some nits in the comments.

* I will now compile the code an do some review on the complete internet_gaming* files.
  (More for me to get familiar with that code)

* Notabalis: I will try to be online with that version starting at perhaps 16:00 CEST,
  so we can try you changes "live" in chat and on IRC.
  Maybe we can hunt down these IRC Bots, too?

* GunCheloc: FYI with latest XCode updates Apple has pushed clang to a newer version,
  so a lot of newer options finally work here and some warnigns are finally gone:
  Apple LLVM version 9.1.0 (clang-902.0.39.1)
  Target: x86_64-apple-darwin17.5.0
  Thread model: posix
  InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin