metaserver无法编译的问题

分支代码metaserver是编译不过的，makefile里面添加后发现很多成员变量不存在，目测是拷贝自nameserver，后来没有继续维护了吗？还是目前分支仅仅并不是最新代码，后续也没维护？谢谢。

Start with the metaserver branch and its Makefile, then inspect the metaserver code alongside nameserver, which the issue identifies as its likely source. Confirm which members reported by the compiler are missing and whether the branch is obsolete or incomplete; done means establishing the supported code path and, if it is meant to build, getting metaserver to compile.

Written by the indexing model from the issue text.