* common/asshelp.c (log_libassuan_system_error): New.
* agent/gpg-agent.c (create_server_socket): Use new log function.
(handle_connections): Log system error code for a failed accept.
* dirmngr/dirmngr.c (handle_connections): Ditto.
* kbx/keyboxd.c (handle_connections): Ditto.
* scd/scdaemon.c (handle_connections): Ditto.
* tpm2d/tpm2daemon.c (handle_connections): Ditto.
* dirmngr/dirmngr.c (main): Log system error code for a failed bin.
* kbx/keyboxd.c (create_server_socket): Ditto.
* scd/scdaemon.c (create_server_socket): Ditto.
* tpm2d/tpm2daemon.c (create_server_socket): Ditto.