Fixes compilation when both libbsd and ptunnel-ng are selected.
libbsd is used for arc4random with a fallback to /dev/random. musl does
not support arc4random.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>

Ptunnel-NG is a bugfixed and refactored version of Ptunnel.
Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies.

Signed-off-by: Toni Uhlig <matzeton@googlemail.com>