wpa_supplicant: Reopen debug log file upon receipt of SIGHUP signal

This is useful for logrotate to be able to rotate the file even if the
control interface is not enabled (e.g., when using DBus).

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

wpa_supplicant/wpa_supplicant.c

@@ -963,6 +963,11 @@ static void wpa_supplicant_reconfig(int sig, void *signal_ctx)
 			wpa_supplicant_terminate_proc(global);
 		}
 	}
+
+	if (wpa_debug_reopen_file() < 0) {
+		/* Ignore errors since we cannot really do much to fix this */
+		wpa_printf(MSG_DEBUG, "Could not reopen debug log file");
+	}
 }