修复多 header 下 pattern 不生效的问题，并合并 vs 规则

[cynial]

看看这两个改动是否合适？#14

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[linfan]

实现有点问题，实际上Pattern的值不能直接用，需要将labelVal替换掉Pattern里面的某个占位符才是包含要匹配的目标环境名称的Pattern，然后作为Regex字段匹配的内容。先合并进来吧，后面我来补。