mod_admin_shell: Document the 'watch' section in the built-in help

util.openmetrics: Set __name field on metatables to improve error messages Don't think we cause any such errors right now, but you never know!

util.openmetrics: Set (previously unused, empty) metatable Silences luacheck warning about the metatable being unused.

luacheck: Ignore new warning about uses of `not (x == y)` and similar Added in luacheck 0.26.

luacheck: Ignore new warning about using variables prefixed with '_' luacheck 0.26 considers the _ prefix as a hint that the variable or argument is unused, then warns if they are used despite this. We have several places where this prefix is used to avoid shadowing another similarly named variable, resulting in many instances of this warning.

core.configmanager: Remove COMPAT for old config format from 2013

util.vcard: Delete since nothing uses it

prosodyctl shell: Communicate width of terminal to mod_admin_shell This lets it adjust the width of tables to the actual terminal width.

mod_smacks: Indicate that bounces are generated by the server Could arguably be implied by 'recipient-unavailable' since if it was available, this error wouldn't happen.

Merge 0.12->trunk