check_tcp: also display the server addr when host_specified is set. This will help the admins when multiple checks are configured

Signed-off-by: Davide Madrisan <davide.madrisan@gmail.com>
Cleaned up status output of check_tcp changes
check_jabber.t - fixed tests for new status output including hostname
Merge PR #1265 from waja/check_tcp_server_addr