renamed inputPlugin.* to decoder_list.*

Since inputPlugin.c manages the list of registered decoders, we should
rename the source file.

src/decoder_list.h

@@ -0,0 +1,46 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * This project's homepage is: http://www.musicpd.org
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef INPUT_PLUGIN_H
+#define INPUT_PLUGIN_H
+
+#include "os_compat.h"
+
+struct decoder_plugin;
+
+/* individual functions to load/unload plugins */
+void loadInputPlugin(struct decoder_plugin * inputPlugin);
+void unloadInputPlugin(struct decoder_plugin * inputPlugin);
+
+/* interface for using plugins */
+
+struct decoder_plugin *getInputPluginFromSuffix(const char *suffix, unsigned int next);
+
+struct decoder_plugin *getInputPluginFromMimeType(const char *mimeType, unsigned int next);
+
+struct decoder_plugin *getInputPluginFromName(const char *name);
+
+void printAllInputPluginSuffixes(FILE * fp);
+
+/* this is where we "load" all the "plugins" ;-) */
+void initInputPlugins(void);
+
+/* this is where we "unload" all the "plugins" */
+void finishInputPlugins(void);
+
+#endif