New port: sysutils/lsyncd

Lsyncd is designed to synchronize a local directory tree with low
profile of expected changes to a remote mirror. Lsyncd is especially
useful to sync data from a secure area to a not-so-secure area.

WWW: https://axkibe.github.io/lsyncd/

PR: 228714
Submitted by: Junichi Satoh <junichi@junichi.org>