Log Message:
p5-Net-Frame-Dump: update to 1.15.

1.15 Tue  1 May 09:16:32 CEST 2018
   - BUGFIX: Dump::Online2: yes, again. Since some newer version of libpcap
             and changes in pcap_dispatch(), we have to call can_read() on the
             selectable file descriptor and call pcap_dispatch() only when
             there is something to read. Which sounds logical, after all.
   - update: copyright notice