Fix new user logins

In main(), login_ok() was being called before ipc_connect() but when a
new user is created, the login_ok() call leads to a broadcast() call
which attempts to reconnect to the server through ipc_check() and fails
because ipc_connect() hasn't set the server location yet. This bug has
been lurking for a while but it has only recently turned into a segfault
due to the NULL server location. Move the broadcast() calls to come
after the ipc_connect() for now.