vim-patch:9.1.0241: filetype: mysql history files are not recognized

Problem:  filetype: mysql history files are not recognized
Solution: Detect .mysql_history as mysql
          (Wu, Zhenyu)

closes: vim/vim#14362

6b285c8cfd

Co-authored-by: Wu, Zhenyu <wuzhenyu@ustc.edu>

runtime/lua/vim/filetype.lua

@@ -1411,6 +1411,7 @@ local filename = {
   ['mplayer.conf'] = 'mplayerconf',
   mrxvtrc = 'mrxvtrc',
   ['.mrxvtrc'] = 'mrxvtrc',
+  ['.mysql_history'] = 'mysql',
   ['/etc/nanorc'] = 'nanorc',
   Neomuttrc = 'neomuttrc',
   ['.netrc'] = 'netrc',

test/old/testdir/test_filetype.vim

@@ -441,7 +441,7 @@ func s:GetFilenameChecks() abort
     \ 'mush': ['file.mush'],
     \ 'mustache': ['file.mustache'],
     \ 'muttrc': ['Muttngrc', 'Muttrc', '.muttngrc', '.muttngrc-file', '.muttrc', '.muttrc-file', '/.mutt/muttngrc', '/.mutt/muttngrc-file', '/.mutt/muttrc', '/.mutt/muttrc-file', '/.muttng/muttngrc', '/.muttng/muttngrc-file', '/.muttng/muttrc', '/.muttng/muttrc-file', '/etc/Muttrc.d/file', '/etc/Muttrc.d/file.rc', 'Muttngrc-file', 'Muttrc-file', 'any/.mutt/muttngrc', 'any/.mutt/muttngrc-file', 'any/.mutt/muttrc', 'any/.mutt/muttrc-file', 'any/.muttng/muttngrc', 'any/.muttng/muttngrc-file', 'any/.muttng/muttrc', 'any/.muttng/muttrc-file', 'any/etc/Muttrc.d/file', 'muttngrc', 'muttngrc-file', 'muttrc', 'muttrc-file'],
-    \ 'mysql': ['file.mysql'],
+    \ 'mysql': ['file.mysql', '.mysql_history'],
     \ 'n1ql': ['file.n1ql', 'file.nql'],
     \ 'named': ['namedfile.conf', 'rndcfile.conf', 'named-file.conf', 'named.conf', 'rndc-file.conf', 'rndc-file.key', 'rndc.conf', 'rndc.key'],
     \ 'nanorc': ['/etc/nanorc', 'file.nanorc', 'any/etc/nanorc'],