Add chatroom discovery logic

Change-Id: I1b65b7bbcf321c51cb00e8d1c05a42291601a284
src: Chatroom Discovery UI

Change-Id: I94ee73ce9b4bcc63e7ecbdbf2f4844b6b57615a3
bug: Fix Face::put warning

Change-Id: I3e327ee58dc089d3b704751e115353f959f2ddd7
bug: fix Qt connect error

Change-Id: I82ca20f2deb97a1fcb5287ad19f5e7ac27e5311c
bug: fix local prefix discovery

Change-Id: I724a25c0f861659e6c6cb4770be1f58eaee8915f
bug: fix hello msg; disable registration

Change-Id: Ib7d462243c2791d6a2fa1a8e091be38ea667aa56
security: temporarily disable security chatroom

Change-Id: I0e3a817a5bf65d07fc609084aaab8572a70e6784
fix localupdate

Change-Id: Ie6cd538d48ffbe4b4c71a113492276286b0aaef7