util.events: Add set_debug_hook() method Hook signature: ret = debug_hook(handler, event_name, event_data)

MUC: Don't default room name to JID localpart (API breaking change) Behavior with turning empty name into localpart was originally introduced in 711eb5bf94b4 This has caused some problems for clients, making it difficult to differentiate between a room actually named like the localpart from a room without a name. Breaking: The function signature of the :get_name() method changes from always returning a string to optional string.

util.jid: Fix special escaping of '\' per XEP-0106 From XEP-0106 §2. Requirements: > in certain circumstances, the escaping character itself ("\") might > also be escaped Later in §4.2 Address Transformation Algorithm it is stated that the backslash would only be escaped if it forms an escape sequence. Thus '\foo' is unaltered but '\20' must be escaped into '\5c20'. Thanks to lovetox and jonas’ for brining up.

util.jid: Add test coverage for XEP-0106: JID Escaping functions

util.error: Add a wrapper for common parameters Lets you set up source and registry once per module

util.error: Add a 'source' parameter where origin module can be mentioned

util.startup: Init util.error with defaults if none given

util.error: Add configuration for including traceback in tostring()

util.error: Allow optional tracebacks to be injected on errors This allows extra debug info to be provided for development purposes.

net.http: http.request() promise now resolves with response (breaking change) Promise mode is not (widely?) used, changing this now while we can, as it improves usability of the API. The request is now available as response.request, if needed.