Add syntax files from upstream vim repository

syntax/group.vim

@@ -0,0 +1,56 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
+  
+" Vim syntax file
+" Language:             group(5) user group file
+" Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
+" Latest Revision:      2012-08-05
+
+if exists("b:current_syntax")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+syn match   groupBegin          display '^' nextgroup=groupName
+
+syn match   groupName           contained display '[^:]\+'
+                                \ nextgroup=groupPasswordColon
+
+syn match   groupPasswordColon  contained display ':'
+                                \ nextgroup=groupPassword,groupShadow
+
+syn match   groupPassword       contained display '[^:]*'
+                                \ nextgroup=groupGIDColon
+
+syn match   groupShadow         contained display '[x*]' nextgroup=groupGIDColon
+
+syn match   groupGIDColon       contained display ':' nextgroup=groupGID
+
+syn match   groupGID            contained display '\d*'
+                                \ nextgroup=groupUserListColon
+
+syn match   groupUserListColon  contained display ':' nextgroup=groupUserList
+
+syn match   groupUserList       contained '[^,]\+'
+                                \ nextgroup=groupUserListSep
+
+syn match   groupUserListSep    contained display ',' nextgroup=groupUserList
+
+hi def link groupDelimiter      Normal
+hi def link groupName           Identifier
+hi def link groupPasswordColon  groupDelimiter
+hi def link groupPassword       Number
+hi def link groupShadow         Special
+hi def link groupGIDColon       groupDelimiter
+hi def link groupGID            Number
+hi def link groupUserListColon  groupDelimiter
+hi def link groupUserList       Identifier
+hi def link groupUserListSep    groupDelimiter
+
+let b:current_syntax = "group"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+endif