vim-patch:9.1.0544: filetype: ldapconf files are not recognized

Problem:  filetype: ldapconf files are not recognized
Solution: Detect '.ldaprc', 'ldap.conf' and 'ldaprc' files as ldapconf
          filetype, include a simple ldapconf ftplugin file
          (Riley Bruins)

[Specification](https://www.openldap.org/software//man.cgi?query=ldap.conf&sektion=5&apropos=0&manpath=OpenLDAP+2.4-Release)

closes: vim/vim#15176

62f31e9499

Co-authored-by: Riley Bruins <ribru17@hotmail.com>

runtime/ftplugin/ldapconf.vim

@@ -0,0 +1,13 @@
+" Vim filetype plugin
+" Language:	ldap.conf(5) configuration file.
+" Maintainer:	Riley Bruins <ribru17@gmail.com>
+" Last Change:	2024 Jul 06
+
+if exists('b:did_ftplugin')
+  finish
+endif
+let b:did_ftplugin = 1
+
+setl comments=:# commentstring=#\ %s
+
+let b:undo_ftplugin = 'setl com< cms<'

runtime/lua/vim/filetype.lua

@@ -1481,6 +1481,9 @@ local filename = {
   Kconfig = 'kconfig',
   ['Kconfig.debug'] = 'kconfig',
   ['Config.in'] = 'kconfig',
+  ['ldaprc'] = 'ldapconf',
+  ['.ldaprc'] = 'ldapconf',
+  ['ldap.conf'] = 'ldapconf',
   ['lftp.conf'] = 'lftp',
   ['.lftprc'] = 'lftp',
   ['/.libao'] = 'libao',

test/old/testdir/test_filetype.vim

@@ -386,6 +386,7 @@ func s:GetFilenameChecks() abort
     \ 'lace': ['file.ace', 'file.ACE'],
     \ 'latte': ['file.latte', 'file.lte'],
     \ 'ld': ['file.ld', 'any/usr/lib/aarch64-xilinx-linux/ldscripts/aarch64elf32b.x'],
+    \ 'ldapconf': ['ldap.conf', '.ldaprc', 'ldaprc'],
     \ 'ldif': ['file.ldif'],
     \ 'lean': ['file.lean'],
     \ 'ledger': ['file.ldg', 'file.ledger', 'file.journal'],