dlg_gamelist renamed to dlg_servergameslist
getChannels: parameter 1 can be const char *
network: HostAddress and HostName are of type std::string now
global: LogAppend takes const string &
status: setText takes const string & for msg
Revert "Fixed warnings mainly by removing unused variables"

This reverts commit 21769eb5c67ae4d2f53ea6f3080a834b26342eaa.

Turns out this commit was rather unhelpful for our case as it
actually broke stuff.
network: errorMessage is of type std::string now ; minor improvements

Note: Currently some smaller texts aren't translated anymore due to this commit,
as sometimes it wasn't possible to surround the text with _()
if (strcmp(...) == 0), not if ( !strcmp(...) )
Small update in CODESTYLE (about strcmp)
Network: tiny improvements