renamed the "mod" decoder plugin to "mikmod"

src/Makefile.am

@@ -285,7 +285,7 @@ mpd_SOURCES += decoder/audiofile_plugin.c
 endif
 
 if HAVE_MIKMOD
-mpd_SOURCES += decoder/mod_plugin.c
+mpd_SOURCES += decoder/mikmod_plugin.c
 endif
 
 if HAVE_MODPLUG

src/decoder/mod_plugin.c → src/decoder/mikmod_plugin.c

@@ -247,8 +247,8 @@ static const char *const modSuffixes[] = {
 	NULL
 };
 
-const struct decoder_plugin modPlugin = {
-	.name = "mod",
+const struct decoder_plugin mikmod_decoder_plugin = {
+	.name = "mikmod",
 	.init = mod_initMikMod,
 	.finish = mod_finishMikMod,
 	.file_decode = mod_decode,

src/decoder_list.c

@@ -33,7 +33,7 @@ extern const struct decoder_plugin aacPlugin;
 extern const struct decoder_plugin mpcPlugin;
 extern const struct decoder_plugin wavpack_plugin;
 extern const struct decoder_plugin modplug_plugin;
-extern const struct decoder_plugin modPlugin;
+extern const struct decoder_plugin mikmod_decoder_plugin;
 extern const struct decoder_plugin ffmpeg_plugin;
 
 static const struct decoder_plugin *const decoder_plugins[] = {
@@ -68,7 +68,7 @@ static const struct decoder_plugin *const decoder_plugins[] = {
 	&modplug_plugin,
 #endif
 #ifdef HAVE_MIKMOD
-	&modPlugin,
+	&mikmod_decoder_plugin,
 #endif
 #ifdef HAVE_FFMPEG
 	&ffmpeg_plugin,