Add VIM syntax highlight for "config"

libertyconf.vim

@@ -0,0 +1,26 @@
+" Since the liberty configuration format is nearly indistinguishable,
+" this syntax highlight definition needs to be loaded with `set ft=libertyconf`
+if exists("b:current_syntax")
+	finish
+endif
+
+syn match libertyconfError "[^_[:alnum:][:space:]]\+"
+syn match libertyconfComment "#.*"
+syn match libertyconfSpecial "{\|}\|="
+syn match libertyconfNumber "[+-]\=\<\d\+\>"
+syn match libertyconfBoolean "\c\<\(true\|yes\|on\|false\|no\|off\)\>"
+syn match libertyconfNull "null"
+syn match libertyconfEscape display "\\\([xX]\x\{1,2}\|\o\{1,3}\|.\|$\)"
+	\ contained
+syn region libertyconfString start=+"+ skip=+\\\\\|\\"+ end=+"+
+	\ contains=libertyconfEscape
+
+let b:current_syntax = "libertyconf"
+hi def link libertyconfError Error
+hi def link libertyconfComment Comment
+hi def link libertyconfSpecial Special
+hi def link libertyconfNumber Number
+hi def link libertyconfBoolean Boolean
+hi def link libertyconfNull Constant
+hi def link libertyconfEscape SpecialChar
+hi def link libertyconfString String