patch 8.2.4778: pacman files use dosini filetype

Problem:    Pacman files use dosini filetype.
Solution:   Use conf instead. (Chaoren Lin, closes #10213)

runtime/filetype.vim

@@ -1287,13 +1287,13 @@ au BufNewFile,BufRead *.org,*.org_archive	setf org
 " Packet filter conf
 au BufNewFile,BufRead pf.conf			setf pf
 
-" Pacman Config (close enough to dosini)
-au BufNewFile,BufRead */etc/pacman.conf		setf dosini
+" Pacman config
+au BufNewFile,BufRead */etc/pacman.conf		setf conf
 
 " Pacman hooks
 au BufNewFile,BufRead *.hook
 	\ if getline(1) == '[Trigger]' |
-	\   setf dosini |
+	\   setf conf |
 	\ endif
 
 " Pam conf

src/testdir/test_filetype.vim

@@ -113,7 +113,7 @@ let s:filename_checks = {
     \ 'cobol': ['file.cbl', 'file.cob', 'file.lib'],
     \ 'coco': ['file.atg'],
     \ 'conaryrecipe': ['file.recipe'],
-    \ 'conf': ['auto.master'],
+    \ 'conf': ['/etc/pacman.conf', 'any/etc/pacman.conf', 'auto.master'],
     \ 'config': ['configure.in', 'configure.ac', '/etc/hostname.file'],
     \ 'context': ['tex/context/any/file.tex', 'file.mkii', 'file.mkiv', 'file.mkvi', 'file.mkxl', 'file.mklx'],
     \ 'cook': ['file.cook'],
@@ -152,7 +152,7 @@ let s:filename_checks = {
     \ 'dnsmasq': ['/etc/dnsmasq.conf', '/etc/dnsmasq.d/file', 'any/etc/dnsmasq.conf', 'any/etc/dnsmasq.d/file'],
     \ 'dockerfile': ['Containerfile', 'Dockerfile', 'file.Dockerfile', 'Dockerfile.debian', 'Containerfile.something'],
     \ 'dosbatch': ['file.bat'],
-    \ 'dosini': ['.editorconfig', '/etc/pacman.conf', '/etc/yum.conf', 'file.ini', 'npmrc', '.npmrc', 'php.ini', 'php.ini-5', 'php.ini-file', '/etc/yum.repos.d/file', 'any/etc/pacman.conf', 'any/etc/yum.conf', 'any/etc/yum.repos.d/file', 'file.wrap'],
+    \ 'dosini': ['.editorconfig', '/etc/yum.conf', 'file.ini', 'npmrc', '.npmrc', 'php.ini', 'php.ini-5', 'php.ini-file', '/etc/yum.repos.d/file', 'any/etc/yum.conf', 'any/etc/yum.repos.d/file', 'file.wrap'],
     \ 'dot': ['file.dot', 'file.gv'],
     \ 'dracula': ['file.drac', 'file.drc', 'filelvs', 'filelpe', 'drac.file', 'lpe', 'lvs', 'some-lpe', 'some-lvs'],
     \ 'dtd': ['file.dtd'],
@@ -1199,12 +1199,12 @@ func Test_hook_file()
 
   call writefile(['[Trigger]', 'this is pacman config'], 'Xfile.hook')
   split Xfile.hook
-  call assert_equal('dosini', &filetype)
+  call assert_equal('conf', &filetype)
   bwipe!
 
   call writefile(['not pacman'], 'Xfile.hook')
   split Xfile.hook
-  call assert_notequal('dosini', &filetype)
+  call assert_notequal('conf', &filetype)
   bwipe!
 
   call delete('Xfile.hook')

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4778,
 /**/
     4777,
 /**/