Contrib: updated vim syntax rules for variables.
Non-quoted parameters are allowed to contain variables in curly brackets
(see d91a8c4ac6bb), so vim syntax rules were adjusted accordingly.
diff --git a/contrib/vim/syntax/nginx.vim b/contrib/vim/syntax/nginx.vim
index dc8c0cb..20bac4a 100644
--- a/contrib/vim/syntax/nginx.vim
+++ b/contrib/vim/syntax/nginx.vim
@@ -15,7 +15,7 @@
syn match ngxName '\([^;{} \t\\]\|\\.\)\+'
\ contains=@ngxDirectives
\ nextgroup=@ngxParams skipwhite skipempty
-syn match ngxParam '\([^;{ \t\\]\|\\.\)\+'
+syn match ngxParam '\(\${\|[^;{ \t\\]\|\\.\)\+'
\ contained
\ contains=ngxVariable
\ nextgroup=@ngxParams skipwhite skipempty
@@ -29,7 +29,7 @@
\ contains=@ngxTopLevel
syn match ngxComment '#.*$'
-syn match ngxVariable '\$\w\+' contained
+syn match ngxVariable '\$\(\w\+\|{\w\+}\)' contained
syn match ngxVariableString '\$\(\w\+\|{\w\+}\)' contained
syn cluster ngxTopLevel
@@ -52,7 +52,7 @@
syn cluster ngxTopLevel add=ngxDirectiveListen
syn keyword ngxDirectiveListen listen
\ nextgroup=@ngxListenParams skipwhite skipempty
-syn match ngxListenParam '\([^;{ \t\\]\|\\.\)\+'
+syn match ngxListenParam '\(\${\|[^;{ \t\\]\|\\.\)\+'
\ contained
\ nextgroup=@ngxListenParams skipwhite skipempty
syn region ngxListenString start=+\z(["']\)+ end=+\z1+ skip=+\\\\\|\\\z1+
