-fix off-by-one so we can also select on FD 0 (stdin)

git-svn-id: https://gnunet.org/svn/gnunet@31365 140774ce-b5e7-0310-ab8b-a85725594a96
-clean up network select code, avoid insane #ifdefing for MINGW

git-svn-id: https://gnunet.org/svn/gnunet@31366 140774ce-b5e7-0310-ab8b-a85725594a96
accept all requests, reduce log level


git-svn-id: https://gnunet.org/svn/gnunet@31367 140774ce-b5e7-0310-ab8b-a85725594a96