logread: fix erroneous message "Logread connected to" with udp

logread: fix erroneous message "Logread connected to" with udp

When streaming the syslog messages via udp, the socket connection
always succeeds by definition, but it can still fail to send. In such
case, the syslog keep repeating the following two messages:

    failed to send log data to ip:port via udp
    Logread connected to ip:port

With this change, only one initial message "Logread connected to..." is
logged.

Also fixed capital letter for "failed to send" message.

Signed-off-by: Giovanni Giacobbi <giovanni@giacobbi.net>
Signed-off-by: Daniel Golle <daniel@makrotopia.org> (string de-duplication)