patch 8.2.2690: PowerShell files are not recognized

Problem:    PowerShell files are not recognized.
Solution:   Recognize several PowerShell extension. (Heath Stewart,
            closes #8051)

runtime/filetype.vim

@@ -1279,6 +1279,11 @@ au BufNewFile,BufRead .povrayrc			setf povini
 " Povray, Pascal, PHP or assembly
 au BufNewFile,BufRead *.inc			call dist#ft#FTinc()
 
+" PowerShell
+au BufNewFile,BufRead	*.ps1,*.psd1,*.psm1,*.pssc	setf ps1
+au BufNewFile,BufRead	*.ps1xml			setf ps1xml
+au BufNewFile,BufRead	*.cdxml,*.psc1			setf xml
+
 " Printcap and Termcap
 au BufNewFile,BufRead *printcap
 	\ let b:ptcap_type = "print" | setf ptcap

src/testdir/test_filetype.vim

@@ -387,6 +387,8 @@ let s:filename_checks = {
     \ 'promela': ['file.pml'],
     \ 'proto': ['file.proto'],
     \ 'protocols': ['/etc/protocols', 'any/etc/protocols'],
+    \ 'ps1': ['file.ps1', 'file.psd1', 'file.psm1', 'file.pssc'],
+    \ 'ps1xml': ['file.ps1xml'],
     \ 'psf': ['file.psf'],
     \ 'puppet': ['file.pp'],
     \ 'pyrex': ['file.pyx', 'file.pxd'],
@@ -538,7 +540,7 @@ 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'],
+    \ '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'],
     \ '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

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2690,
 /**/
     2689,
 /**/