Update runtime files
diff --git a/runtime/syntax/pamenv.vim b/runtime/syntax/pamenv.vim
new file mode 100644
index 0000000..90359da
--- /dev/null
+++ b/runtime/syntax/pamenv.vim
@@ -0,0 +1,28 @@
+" Vim syntax file
+" Language: pam_env.conf(5) configuration file
+" Latest Revision: 2020-05-10
+
+if exists("b:current_syntax")
+ finish
+endif
+
+syn keyword pamenvTodo contained TODO FIXME XXX NOTE
+syn region pamenvComment start='^#' end='$' display oneline contains=pamenvTodo,@Spells
+
+syn match pamenvVars '^[A-Z_][A-Z_0-9]*' nextgroup=pamenvKeywords skipwhite
+
+syn keyword pamenvKeywords contained DEFAULT OVERRIDE nextgroup=pamenvVarEq
+
+syn match pamenvVarEq contained '=' nextgroup=pamenvValue,pamenvValueWithQuote
+
+syn match pamenvValue contained '[^ \t]*' skipwhite nextgroup=pamenvKeywords
+syn region pamenvValueWithQuote contained start='"' end='"' skipwhite nextgroup=pamenvKeywords
+
+hi def link pamenvTodo Todo
+hi def link pamenvComment Comment
+hi def link pamenvKeywords Keyword
+hi def link pamenvVars Identifier
+hi def link pamenvValue String
+hi def link pamenvValueWithQuote String
+
+let b:current_syntax = "pamenv"