AllowSelf can skip 0.0.0.0 and connect to itself

[labi-le]

peerdiscovery/listener.go

Line 127 in 70a1537

srcHost, _, _ := net.SplitHostPort(src.String())

For example, if the computer has lost access to the Internet, the IP 0.0.0.0.0 will appear in Notify

[schollz]

would accept PR