New port: devel/lua-cqueues

cqueues is a type of event loop for Lua, except it's not a classic
event loop. It doesn't use callbacks, neither as part of the API nor
internally, but instead you communicate with an event controller by
the yielding and resumption of Lua coroutines using objects that
adhere to a simple interface.

WWW: http://25thandclement.com/~william/projects/cqueues.html

PR: 247739
Submitted by: Leo Vandewoestijne <freebsd@dns.company>