Make Bfs_client cat/mkdir/touchz/rm/rmdir/rmr/du  Support Multi-arg (#710)
Make Bfs_client cat/mkdir/touchz/rm/rmdir/rmr/du  Support Multi-arg (#710)

Optimize bfs_client cat/mkdir/touchz/rm/rmdir/rmr/du  support multi file args.

(#723)

yvxiang/coverage_for_bfs,yvxiang/coverage_for_bfs,baidu/bfs,yvxiang/dfs,bluebore/dfs,baidu/bfs,bluebore/dfs,linyvxiang/dfs,lylei/dfs,lylei/dfs,yvxiang/coverage_for_bfs,yvxiang/dfs,yvxiang/dfs,bluebore/dfs,lylei/dfs,bluebore/bfs,linyvxiang/dfs,yvxiang/dfs,bluebore/bfs,lylei/dfs,baidu/bfs,baidu/bfs,yvxiang/coverage_for_bfs,bluebore/bfs,linyvxiang/dfs