Support for YAML tmlanguage

[Diego Suárez]

Since other tools (like bat) use tmLanguage but don't accept XML plists, I translated the file to YAML. You can freely use it or include it in the repo if you want to:

%YAML 1.2
---
# http://www.sublimetext.com/docs/3/syntax.html
name: VCL
file_extensions:
  - vcl.erb
  - vcl
scope: source.varnish.vcl
contexts:
  main:
    - match: \#.*
      scope: comment.line.number-sign.vcl
    - match: \/\/.*
      scope: comment.line.double-slash.vcl
    - match: \/\*
      push:
        - meta_scope: comment.block.vcl
        - match: \*\/
          pop: true
    - match: \b(import|include)\b\s*
      captures:
        1: keyword.control.import.php
      push:
        - meta_scope: meta.include.vcl
        - match: (?=\s|;|$)
          pop: true
        - include: strings
    - match: '(?i)^\s*(director)\s+([a-z0-9_]+)\s+(round\-robin|random|client|hash|dns|fallback)\s*\{'
      captures:
        1: storage.type.director.vcl
        2: entity.name.type.director.vcl
        3: storage.type.director.family.vcl
      push:
        - meta_scope: meta.director.vcl
        - match: '\}'
          captures:
            1: storage.type.director.vcl
            2: entity.name.type.director.vcl
            3: storage.type.director.family.vcl
          pop: true
        - include: main
    - match: '(?i)^\s*(backend)\s+([a-z0-9_]+)\s*\{'
      captures:
        1: storage.type.backend.vcl
        2: entity.name.type.backend.vcl
      push:
        - meta_scope: meta.backend.vcl
        - match: '\}'
          captures:
            1: storage.type.backend.vcl
            2: entity.name.type.backend.vcl
          pop: true
        - include: main
    - match: '(?i)^\s*(acl)\s+([a-z0-9_]+)\s*\{'
      captures:
        1: storage.type.acl.vcl
        2: entity.name.type.acl.vcl
      push:
        - meta_scope: meta.acl.vcl
        - match: '\}'
          captures:
            1: storage.type.acl.vcl
            2: entity.name.type.acl.vcl
          pop: true
        - include: main
    - match: '(?i)^\s*(probe)\s+([a-z0-9_]+)\s*'
      scope: meta.probe.vcl
      captures:
        1: storage.type.probe.vcl
        2: entity.name.type.probe.vcl
    - match: '(?i)^\s*(sub)\s+([a-z0-9_]+)\s*\{'
      captures:
        1: storage.type.subroutine.vcl
        2: entity.name.type.subroutine.vcl
      push:
        - meta_scope: meta.subroutine.vcl
        - match: '\}'
          captures:
            1: storage.type.subroutine.vcl
            2: entity.name.type.subroutine.vcl
          pop: true
        - include: main
    - match: \b(return)\s*\(
      captures:
        1: keyword.control.vcl
      push:
        - match: \)
          captures:
            1: keyword.control.vcl
          pop: true
        - match: (deliver|error|fetch|hash|hit_for_pass|lookup|ok|pass|pipe|restart|synth|retry|abandon|fail|purge)
          scope: constant.language.return.vcl
    - match: \b(error)\b\s*
      captures:
        1: keyword.control.error
      push:
        - meta_scope: meta.error.vcl
        - match: (?=\s|;|$)
          pop: true
        - include: strings
        - include: numbers
    - match: \b(set|unset|remove|synthetic|call|if|else|elsif|else if)\b
      captures:
        1: keyword.control.php
    - include: variables
    - include: numbers
    - include: strings
    - include: functions
    - include: constants
    - include: subkeys
    - include: blocks
  blocks:
    - match: '\{'
      push:
        - match: '\}'
          pop: true
        - include: main
  constants:
    - match: \b(true|false|now)\b
      scope: constant.builtin.vcl
  functions:
    - match: (hash_data|regsuball|regsub|ban_url|ban|purge|synth)
      scope: support.function.builtin.vcl
    - match: std\.(log|toupper|tolower|set_ip_tos|random|log|syslog|fileread|collect|duration|integer|ip)
      scope: support.function.module.std.vcl
    - match: 'redis[0-9]?\.(call|send|pipeline|init_redis)'
      scope: support.function.module.libvmodredis.vcl
  numbers:
    - match: '\b[0-9]+ ?(m|s|h|d|w)\b'
      scope: constant.numeric.time.vcl
    - match: '\b[0-9]+(\b|;)'
      scope: constant.numeric.vcl
  string-double-quoted:
    - match: '"'
      captures:
        0: punctuation.definition.string.begin.vcl
      push:
        - meta_scope: string.quoted.double.vcl
        - meta_content_scope: meta.string-contents.quoted.double.vcl
        - match: '"'
          captures:
            0: punctuation.definition.string.end.vcl
          pop: true
        - match: '\\[\\"]'
          scope: constant.character.escape.vcl
  string-long:
    - match: '\{"'
      captures:
        0: punctuation.definition.string.begin.vcl
      push:
        - meta_scope: string.quoted.long.vcl
        - meta_content_scope: meta.string-contents.quoted.double.vcl
        - match: '"\}'
          captures:
            0: punctuation.definition.string.end.vcl
          pop: true
  string-single-quoted:
    - match: "'"
      captures:
        0: punctuation.definition.string.begin.vcl
      push:
        - meta_scope: string.quoted.single.vcl
        - meta_content_scope: meta.string-contents.quoted.single.vcl
        - match: "'"
          captures:
            0: punctuation.definition.string.end.vcl
          pop: true
        - match: '\\[\\'']'
          scope: constant.character.escape.vcl
  strings:
    - include: string-long
    - include: string-single-quoted
    - include: string-double-quoted
  subkeys:
    - match: \.(max_connections|first_byte_timeout|between_bytes_timeout|probe|host_header|retries|backend|weight|host|list|port|connect_timeout|ttl|suffix|url|request|window|threshold|initial|expected_response|interval|timeout)\b
      scope: variable.subkey.vcl
  variables:
    - match: '(req|bereq|obj|beresp|client|server|resp)\.[a-zA-Z0-9\-\_\.]+'
      scope: variable.other.vcl