tree 0ddd0acdb03e71b915568f1b4e248e396fb6ba82
parent a54d5a6d2c7b497a3db72a5f29c933ea223967fd
author Junxiao Shi <git@mail1.yoursunny.com> 1487015112 +0000
committer Junxiao Shi <git@mail1.yoursunny.com> 1487015112 +0000

mgmt: add FaceQueryFilter::empty()

This commit also simplifies FaceQueryFilter with ndn::optional.

refs #3864

Change-Id: I7cd52101b83ca88df499ca4b507ce93ef6269fd4