* Fixed completely broken error reporting; Write()/Read() will now return the
proper error code (and ssize_t instead of int32).
* Reimplemented WaitForData() using poll() which is more efficient.
* Now uses BNetworkAddress to resolve the server address which also should now
work with IPv6.
* Removed some unused headers.
* Minor coding style cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43141 a95241bf-73f2-0310-859d-f6bbb57e9c96
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