patch 9.1.1320: filetype: alsoft config files are not recognized

Problem:  filetype: alsoft config files are not recognized
Solution: detect alsoft config files as dosini filetype
          (David Mandelberg)

References:
* code with paths to config: ReadALConfig() in
  https://github.com/kcat/openal-soft/blob/master/alc/alconfig.cpp
* example config:
  https://github.com/kcat/openal-soft/blob/master/alsoftrc.sample

closes: #17140

Signed-off-by: David Mandelberg <david@mandelberg.org>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -1780,6 +1780,9 @@ au BufNewFile,BufRead .ondirrc			setf ondir
 " OPAM
 au BufNewFile,BufRead opam,*.opam,*.opam.template,opam.locked,*.opam.locked setf opam
 
+" OpenAL Soft config files
+au BufNewFile,BufRead .alsoftrc,alsoft.conf,alsoft.ini,alsoftrc.sample setf dosini
+
 " OpenFOAM
 au BufNewFile,BufRead [a-zA-Z0-9]*Dict\(.*\)\=,[a-zA-Z]*Properties\(.*\)\=,*Transport\(.*\),fvSchemes,fvSolution,fvConstrains,fvModels,*/constant/g,*/0\(\.orig\)\=/* call dist#ft#FTfoam()
 

src/testdir/test_filetype.vim

@@ -239,7 +239,9 @@ def s:GetFilenameChecks(): dict<list<string>>
              '.coveragerc', '.pypirc', '.gitlint', '.oelint.cfg', 'pylintrc', '.pylintrc',
              '/home/user/.config/bpython/config', '/home/user/.config/mypy/config', '.wakatime.cfg', '.replyrc',
              'psprint.conf', 'sofficerc', 'any/.config/lxqt/globalkeyshortcuts.conf', 'any/.config/screengrab/screengrab.conf',
-             'any/.local/share/flatpak/repo/config', '.notmuch-config', '.notmuch-config.myprofile',
+             'any/.local/share/flatpak/repo/config',
+             '.alsoftrc', 'alsoft.conf', 'alsoft.ini', 'alsoftrc.sample',
+             '.notmuch-config', '.notmuch-config.myprofile',
              '~/.config/notmuch/myprofile/config'] + WhenConfigHome('$XDG_CONFIG_HOME/notmuch/myprofile/config'),
     dot: ['file.dot', 'file.gv'],
     dracula: ['file.drac', 'file.drc', 'file.lvs', 'file.lpe', 'drac.file'],

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1320,
 /**/
     1319,
 /**/