net/asterisk20: Update 20.17.0 => 20.18.1
Changelog:
https://downloads.asterisk.org/pub/telephony/asterisk/old-releases/ChangeLog-20.18.0.html
https://downloads.asterisk.org/pub/telephony/asterisk/old-releases/ChangeLog-20.18.1.html
This update incorporates an important fix for FreeBSD users:
- rtp/rtcp: Configure dual-stack behavior via IPV6_V6ONLY
PR: 262386 292768
Approved by: Oleksandr Kryvulia <o.kryvulia@flex-it.com.ua> (maintainer)
Sponsored by: PANS Jarosław
MFH: 2026Q1