Retry binding GPGNet socket after fail + delay

[Geosearchef]

Socket probably still open / not closed completely

2021-12-29 22:46:49.320 ERROR Couldn't start GPGNetServer (c.f.iceadapter.gpgnet.GPGNetServer:51)
java.net.BindException: Address already in use: bind
    at java.base/sun.nio.ch.Net.bind0(Native Method)
    at java.base/sun.nio.ch.Net.bind(Net.java:550)
    at java.base/sun.nio.ch.Net.bind(Net.java:539)
    at java.base/sun.nio.ch.NioSocketImpl.bind(NioSocketImpl.java:643)
    at java.base/java.net.ServerSocket.bind(ServerSocket.java:396)
    at java.base/java.net.ServerSocket.<init>(ServerSocket.java:282)
    at java.base/java.net.ServerSocket.<init>(ServerSocket.java:173)
    at com.faforever.iceadapter.gpgnet.GPGNetServer.init(GPGNetServer.java:49)
    at com.faforever.iceadapter.IceAdapter.main(IceAdapter.java:60)