log file
[DEBUG] filter out invalid XMPP message

XMPP server sends OnPresence message with fingerprint. Currently,
I do not know why XMPP server behaves in this way. For the tiem being,
we simply filter out message without fingerprints.
debug and log enhence
Merge pull request #17 from kyuhojeong/invalid_conreq

[DEBUG] filter out invalid XMPP message …