Add support for auto-away based on screen attach/detach

src/term_mplex.h

@@ -0,0 +1,32 @@
+/*  term_mplex.h
+ *
+ *
+ *  Copyright (C) 2015 Toxic All Rights Reserved.
+ *
+ *  This file is part of Toxic.
+ *
+ *  Toxic is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Toxic is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Toxic.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef TERM_MPLEX_H
+#define TERM_MPLEX_H
+
+/* Checks if Toxic runs inside a terminal multiplexer (GNU screen or tmux). If
+   yes, it initializes a timer which periodically checks the attached/detached
+   state of the terminal and updates away status accordingly.
+ */
+void init_mplex_away_timer (Tox *m);
+
+#endif /* #define TERM_MPLEX_H */