utils/misc: added vim syntax and auto-detect scripts

utils/misc/vim/README

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+Vim scripts to auto-detect SER and Kamailio configuration files and
+enable syntax highlighting for them.
+
+Install:
+
+- copy ftdetect/ser.vim to ~/.vim/ftdetect/ser.vim
+- copy syntax/ser.vim to ~/.vim/syntax/ser.vim
+
+Usage:
+
+- autodetection is based on .cfg extension and match of #!SER,
+#!KAMAILIO (and other variants), modparam or route keywords in
+first 400 lines of file. You can enable syntax highlighting for files
+not auto-detected with vim command: "setf ser".

utils/misc/vim/ftdetect/ser.vim

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+" Copy this file to $HOME/.vim/ftdetect/ser.vim
+
+func! s:cfgType() 
+   let max = line("$") > 400 ? 400 : line("$") 
+   for n in range(1, max) 
+      if getline(n) =~ '^\s*#!\(KAMAILIO\|OPENSER\|SER\|ALL\|MAXCOMPAT\)' 
+         set filetype=ser 
+         return 
+	 elseif getline(n) =~ '^\s*modparam\s*(\s*"[^"]\+"' 
+         set filetype=ser 
+         return 
+      elseif getline(n) =~ '^\s*route\s*{\s*' 
+         set filetype=ser 
+         return 
+      endif 
+   endfor 
+   setf cfg 
+endfunc
+
+au BufNewFile,BufRead *.cfg   call s:cfgType() 
+