util.ip: Fix equality metamethod for Lua 5.3

util.array: Fix equality metamethod in Lua 5.3 Lua 5.2 only used the __eq metamethod if both operands have the same __eq, but Lua 5.3 will pick one from either operands that has one as long as both are tables. This results in array() == {} and all sorts of odd behavior, including array() == util.json.null. <MattJ> I think [array() == {}] should have the same semantics as {} == {}

util.json: Test util.array integration This is to expose how [] == json.null due to a change in Lua 5.3 with how the equality metamethod is chosen.

util.array: Add a test case for a behavior change in Lua 5.3 In Lua 5.1 and 5.2 the __eq metamethod is not invoked if the other argument is of a different metatable, but in Lua 5.3 it is.

net.server_epoll: Log error about missing *all* callbacks at 'error' level

net.server_epoll: Log errors caught in listeners on 'error' level

net.server_epoll: Add option for reducing debug logging Sometimes all these things just drown out the logs you are interested in with low-level socket noise. Enabled since it's still new and experimental.

net.server_epoll: Collect full traceback from errors in listeners

mod_muc_mam: Measure how long a cleanup run takes (like mod_mam)

net.websocket.frames: Add ping and pong test cases