patch 9.1.1212: filetype: logrotate'd pacmanlogs are not recognized

Problem:  filetype: logrotate'd pacmanlogs are not recognized
Solution: also detect pacman.log* files as pacmanlog filetype,
          remove BufNewFile autocmd (Eisuke Kawashima)

closes: #16873

Signed-off-by: Eisuke Kawashima <e-kwsm@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/filetype.vim

@@ -1814,7 +1814,7 @@ au BufNewFile,BufRead *.hook
 au BufNewFile,BufRead {.,}makepkg.conf			setf sh
 
 " Pacman log
-au BufNewFile,BufRead pacman.log			setf pacmanlog
+au BufRead pacman.log*					call s:StarSetf('pacmanlog')
 
 " Pam conf
 au BufNewFile,BufRead */etc/pam.conf			setf pamconf

src/testdir/test_filetype.vim

@@ -574,7 +574,6 @@ def s:GetFilenameChecks(): dict<list<string>>
     opl: ['file.OPL', 'file.OPl', 'file.OpL', 'file.Opl', 'file.oPL', 'file.oPl', 'file.opL', 'file.opl'],
     ora: ['file.ora'],
     org: ['file.org', 'file.org_archive'],
-    pacmanlog: ['pacman.log'],
     pamconf: ['/etc/pam.conf', '/etc/pam.d/file', 'any/etc/pam.conf', 'any/etc/pam.d/file'],
     pamenv: ['/etc/security/pam_env.conf', '/home/user/.pam_environment', '.pam_environment', 'pam_env.conf'],
     pandoc: ['file.pandoc', 'file.pdk', 'file.pd', 'file.pdc'],
@@ -2877,4 +2876,16 @@ func Test_org_file()
   filetype off
 endfunc
 
+" Filetypes detected from names of existing files
+func Test_pacmanlog()
+  filetype on
+  for fname in ['pacman.log', 'pacman.log.1', 'pacman.log-20250123']
+    call writefile(["[2025-01-23T01:23:45+0000] [PACMAN] Running 'pacman -S -y --config /etc/pacman.conf --'"], fname, 'D')
+    exe 'split ' .. fname
+    call assert_equal('pacmanlog', &filetype, 'for text: ' .. string(fname))
+    bwipe!
+  endfor
+  filetype off
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1212,
 /**/
     1211,
 /**/