Minor cleanups for async DNS etc.
* src/frame.h (FRAME_WINDOW_CONFIGURATION_CHANGED): Omit unnecessary parens. * src/gnutls.c (gnutls_try_handshake, emacs_gnutls_deinit) (gnutls_verify_boot): Use bool for boolean. (ATTRIBUTE_FORMAT_PRINTF): Add printf attribute. * src/process.c (free_dns_request, Fmake_network_process): Allocate and free async request control block all in one go. (set_network_socket_coding_system, finish_after_tls_connection) (connect_network_socket): Now static. (conv_numerical_to_lisp): 2nd arg is now int, not unsigned. (Fmake_network_process): Use list1 for brevity. (wait_for_socket_fds): 2nd arg is now const ptr. * src/process.h (struct Lisp_Process.dns_request): Now struct gaicb *, not struct gaicb **, since there was always exactly one. All uses changed. * src/window.c, src/window.h (run_window_configuration_change_hook): Now static.
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