net-im/cordless: Update to 2020.10.24

Update from version 2020-08-30 to 2020.10.24 with many new features,
enhancements and bug fixes [1].

[1] https://github.com/Bios-Marcel/cordless/releases/2020-10-24

PR: 251068
Submitted by: Lewis Cook <vulcan@wired.sh> (maintainer)
Approved by: tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D27208