patch 8.2.3473: some files with tcl syntax are not recognized

Problem:    Some files with tcl syntax are not recognized.
Solution:   Add a few file patterns. (Doug Kearns
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index 960ee39..f8b2498 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1116,6 +1116,9 @@
 " Mutt setup files (must be before catch *.rc)
 au BufNewFile,BufRead */etc/Muttrc.d/*		call s:StarSetf('muttrc')
 
+" Tcl Shell RC file
+au BufNewFile,BufRead tclsh.rc			setf tcl
+
 " M$ Resource files
 au BufNewFile,BufRead *.rc,*.rch		setf rc
 
@@ -1811,7 +1814,7 @@
 au BufRead,BufNewFile *.task			setf taskedit
 
 " Tcl (JACL too)
-au BufNewFile,BufRead *.tcl,*.tk,*.itcl,*.itk,*.jacl	setf tcl
+au BufNewFile,BufRead *.tcl,*.tm,*.tk,*.itcl,*.itk,*.jacl,.tclshrc,.wishrc	setf tcl
 
 " TealInfo
 au BufNewFile,BufRead *.tli			setf tli
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 42fe65a..b1aa7cd 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -493,7 +493,7 @@
     \ 'tak': ['file.tak'],
     \ 'taskdata': ['pending.data', 'completed.data', 'undo.data'],
     \ 'taskedit': ['file.task'],
-    \ 'tcl': ['file.tcl', 'file.tk', 'file.itcl', 'file.itk', 'file.jacl'],
+    \ 'tcl': ['file.tcl', 'file.tm', 'file.tk', 'file.itcl', 'file.itk', 'file.jacl', '.tclshrc', 'tclsh.rc', '.wishrc'],
     \ 'teraterm': ['file.ttl'],
     \ 'terminfo': ['file.ti'],
     \ 'tex': ['file.latex', 'file.sty', 'file.dtx', 'file.ltx', 'file.bbl'],
diff --git a/src/version.c b/src/version.c
index 7d348c4..21aab4f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3473,
+/**/
     3472,
 /**/
     3471,