patch 8.2.3452: MPD files are not recognized

Problem:    MPD files are not recognized.
Solution:   Recognize MPD files as XML. (Steven Penny, closes #8893)

runtime/filetype.vim

@@ -1092,6 +1092,9 @@ au BufNewFile,BufRead *.moo			setf moo
 " Modconf
 au BufNewFile,BufRead */etc/modules.conf,*/etc/modules,*/etc/conf.modules setf modconf
 
+" MPD is based on XML
+au BufNewFile,BufRead *.mpd			setf xml
+
 " Mplayer config
 au BufNewFile,BufRead mplayer.conf,*/.mplayer/config	setf mplayerconf
 

src/testdir/test_filetype.vim

@@ -551,7 +551,7 @@ let s:filename_checks = {
     \ 'xhtml': ['file.xhtml', 'file.xht'],
     \ 'xinetd': ['/etc/xinetd.conf', '/etc/xinetd.d/file', 'any/etc/xinetd.conf', 'any/etc/xinetd.d/file'],
     \ 'xmath': ['file.msc', 'file.msf'],
-    \ 'xml': ['/etc/blkid.tab', '/etc/blkid.tab.old', 'file.xmi', 'file.csproj', 'file.csproj.user', 'file.ui', 'file.tpm', '/etc/xdg/menus/file.menu', 'fglrxrc', 'file.xlf', 'file.xliff', 'file.xul', 'file.wsdl', 'file.wpl', 'any/etc/blkid.tab', 'any/etc/blkid.tab.old', 'any/etc/xdg/menus/file.menu', 'file.atom', 'file.rss', 'file.cdxml', 'file.psc1'],
+    \ 'xml': ['/etc/blkid.tab', '/etc/blkid.tab.old', 'file.xmi', 'file.csproj', 'file.csproj.user', 'file.ui', 'file.tpm', '/etc/xdg/menus/file.menu', 'fglrxrc', 'file.xlf', 'file.xliff', 'file.xul', 'file.wsdl', 'file.wpl', 'any/etc/blkid.tab', 'any/etc/blkid.tab.old', 'any/etc/xdg/menus/file.menu', 'file.atom', 'file.rss', 'file.cdxml', 'file.psc1', 'file.mpd'],
     \ 'xmodmap': ['anyXmodmap', 'Xmodmap', 'some-Xmodmap', 'some-xmodmap', 'some-xmodmap-file', 'xmodmap', 'xmodmap-file'],
     \ 'xf86conf': ['xorg.conf', 'xorg.conf-4'],
     \ 'xpm2': ['file.xpm2'],

src/version.c

@@ -757,6 +757,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3452,
 /**/
     3451,
 /**/