No error output when fail to handshake due to OS time difference

Hi,

I am using the v3.0 stable, I found that when the supernode encryption mode was on, and if the supernode OS and edge OS have time difference, usually above 1 minute, the edge failed to join the N2N, and no error output.

After time sync in both supernode and edge, the issue was solved. Would you add relevant error output when the underlayer failed to handshake due to encrypt/decrypt issue?

My supernode config

/usr/bin/supernode -f -p 12345 -v -F ABC -c /etc/n2n/community.list

My edge config

edge.conf
=========
-f
-l x.x.x.x:12345
-r
-E
-z2
-m 02:e7:89:72:2a:32
-d n2n
--persistent
-c boston
-I node
-J PASSWORD
-P XXXXXXXXbLkp465qQ0dwNUmZia70QKG6XXXXXXX
-A5
-k SecretKey
-a 10.120.10.x/16