新增nginx绑定

plugin/nginx/contrib/vim/ftdetect/nginx.vim

@@ -0,0 +1,4 @@
+au BufRead,BufNewFile *.nginx set ft=nginx
+au BufRead,BufNewFile */etc/nginx/* set ft=nginx
+au BufRead,BufNewFile */usr/local/nginx/conf/* set ft=nginx
+au BufRead,BufNewFile nginx.conf set ft=nginx

plugin/nginx/contrib/vim/ftplugin/nginx.vim

@@ -0,0 +1 @@
+setlocal commentstring=#\ %s

plugin/nginx/contrib/vim/indent/nginx.vim

@@ -0,0 +1,11 @@
+if exists("b:did_indent")
+    finish
+endif
+let b:did_indent = 1
+
+setlocal indentexpr=
+
+" cindent actually works for nginx' simple file structure
+setlocal cindent
+" Just make sure that the comments are not reset as defs would be.
+setlocal cinkeys-=0#