vim-patch:9.0.2179: no filetype detection for execline scripts

Problem:  no filetype detection for execline scripts
Solution: Add filetype detection for execline

as a prior to adding syntax support for execline (see
https://github.com/djpohly/vim-execline/issues/2), i went ahead and made
the filetype detection for execline scripts.

closes: vim/vim#13689

Signed-Off-By: Mazunki Hoksaas <rolferen@gmail.com>

63210c214a

Co-authored-by: Mazunki Hoksaas <rolferen@gmail.com>

runtime/lua/vim/filetype.lua

@@ -1656,6 +1656,11 @@ local pattern = {
   ['.*/dtrace/.*%.d'] = 'dtrace',
   ['.*esmtprc'] = 'esmtprc',
   ['.*Eterm/.*%.cfg'] = 'eterm',
+  ['.*s6.*/up'] = 'execline',
+  ['.*s6.*/down'] = 'execline',
+  ['.*s6.*/run'] = 'execline',
+  ['.*s6.*/finish'] = 'execline',
+  ['s6%-.*'] = 'execline',
   ['[a-zA-Z0-9].*Dict'] = detect.foam,
   ['[a-zA-Z0-9].*Dict%..*'] = detect.foam,
   ['[a-zA-Z].*Properties'] = detect.foam,

runtime/lua/vim/filetype/detect.lua

@@ -1661,6 +1661,7 @@ local patterns_hashbang = {
   ['^\\%(rexx\\|regina\\)\\>'] = { 'rexx', { vim_regex = true } },
   ['^janet\\>'] = { 'janet', { vim_regex = true } },
   ['^dart\\>'] = { 'dart', { vim_regex = true } },
+  ['^execlineb\\>'] = { 'execline', { vim_regex = true } },
 }
 
 ---@private