docs: audit direct lifecycle and buffer endpoints

src/nwbind.c

@@ -2946,11 +2946,26 @@ static void handle_fxx(int gelen, int func)
                   break;
     }  /* switch */
   } else if (func == 0x18) {  /* End of Job */
-    /* Forwarded direct NCP 0x2222/24 cleanup after nwconn releases local handles. */
+    /*
+     * Forwarded direct NCP 0x2222/24 End of Job.
+     *
+     * handle_fxx() does not consume a grouped subfunction header for this
+     * direct function: requestdata points at the empty post-FunctionCode
+     * payload.  nwconn has already released task-local handles; nwbind only
+     * closes the matching print jobs and returns a normal empty reply.
+     */
     if (!(entry8_flags&0x200)) /* pcz: 14-Apr-00 */
       nw_close_connection_jobs(act_connection, ncprequest->task); /* close print jobs */
   } else if (func == 0x19) {  /* logout */
-    /* Forwarded direct NCP 0x2222/25 logout cleanup after nwconn resets connection state. */
+    /*
+     * Forwarded direct NCP 0x2222/25 Logout.
+     *
+     * handle_fxx() does not consume a grouped subfunction header for this
+     * direct function: requestdata points at the empty post-FunctionCode
+     * payload.  nwconn has already released local queue/file/user state;
+     * nwbind closes any remaining print jobs, records logout state, clears
+     * bindery identity, and returns a normal empty reply.
+     */
     nw_close_connection_jobs(act_connection, -1);  /* close all print jobs */
     write_utmp(0, act_connection, act_c->pid_nwconn, &(act_c->client_adr), NULL);
     act_c->object_id  = 0; /* not LOGIN  */