The _tttt______cccc_llll_oooo_ssss_eeee function informs the transport provider that the user is
finished with the transport endpoint specified by _ffff_dddd, and frees any local
library resources associated with the endpoint. In addition, _tttt______cccc_llll_oooo_ssss_eeee
closes the file associated with the transport endpoint.
_tttt______cccc_llll_oooo_ssss_eeee should be called from the _TTTT______UUUU_NNNN_BBBB_NNNN_DDDD state [see _tttt______gggg_eeee_tttt_ssss_tttt_aaaa_tttt_eeee(3N)].
However, this function does not check state information, so it may be
called from any state to close a transport endpoint. If this occurs, the
local library resources associated with the endpoint will be freed
automatically. In addition, _cccc_llll_oooo_ssss_eeee(2) will be issued for that file
descriptor; the close will be abortive if no other process has that file
open, and will break any transport connection that may be associated with
that endpoint.
This function resides within both the X/Open compliant _llll_iiii_bbbb_xxxx_nnnn_eeee_tttt and the