net/scamper: update to 20230614c

This update fixes the build on 15-CURRENT.

scamper:
* fix compile-on-windows support; use icmp-echo probes instead of UDP
  probes for traceroute on windows; provide "attach" support on
  windows.
* fix compile-on-FreeBSD-15+ where pf firewall does not have
  DIOCGETSTATUS ioctl
* in scamper's remote control (-R option), fix file descriptor leak
  when unable to reconnect to the remote controller.
* add --disable-scamper-trace --disable-scamper-ping
  --disable-scamper-tracelb --disable-scamper-dealias
  --disable-scamper-tbit --disable-scamper-sting
  --disable-scamper-sniff --disable-scamper-host configure options
  to build scamper without specific measurement capabilities.

sc_attach:
* add windows support

Changelog: https://mailman.caida.org/pipermail/scamper-announce/2023-October/000036.html

PR:		274287
MFH:		2023Q4