mfsmount: fix previous broken commit

Restored pointer to fuse_ctx in function signarute.
Merge pull request #34 from qbm/master

mfsmount: fix previous broken commit
tianzhongbo: fsync on fd close
tianzhongbo: symlink support
tianzhongbo: repair invalid copies
tianzhongbo: fix parse hdd config bug
make 'dev+dl_tianzhongbo' compile