add missing header file

src/docs.h

@@ -0,0 +1,30 @@
+/*
+ *  TVheadend
+ *  Copyright (C) 2016 Jaroslav Kysela
+ *
+ *  This program 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.
+ *
+ *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __TVH_DOCS_H__
+#define __TVH_DOCS_H__
+
+struct tvh_doc_page {
+  const char *name;
+  const char **strings;
+};
+
+extern const struct tvh_doc_page tvh_doc_markdown_pages[];
+
+#endif /* __TVH_DOCS_H__ */
+