* move serv_func.c:read_server_binary() to tcp_sockets.c: serv_read_binary()

* move serv_func.c:read_server_binary() to tcp_sockets.c: serv_read_binary()
* serv_read_binary() now knows a way to get the whole thing at once instead of scattering in 4k blocks
* close the server file in all conditions while loading images, else our facility might block in the server
* add -R commandline switch so the user can limit the blobsize if the tcp connection citserver <-> webcit is expected to be less stable