mod_admin_shell: Fix linter issues

mod_invites: Use new shell-command API

mod_admin_shell: Remove verbose logging

mod_admin_shell: Remove timer:info() (it's been debug:timers() for some time)

mod_admin_shell: Support for 'shell-command' items (global and per-host) This should simplify adding shell commands from other modules, which will reduce the growth of mod_admin_shell and make it easier for community modules to expose commands too.

mod_admin_shell: Refactor help to data structures for extensibility This makes it easier for commands added by other modules to add to the help output, for example.

migrator: Add an escape hatch to allow arbitrary config options Previously only SQL settings and the 'path' for internal storage could be set, and only for SQL and internal storage. input { type = "whatever"; config = { whatever_foobar = "something" } }

util.poll: Rename things to clarify poll(2) limits With epoll(7), MAX_EVENTS controls how many events can be retrieved in one epoll_wait call, while with poll(2) this MAX_WATCHED controls how many sockets or other FDs can be watched at once.

mod_storage_internal: Clear archive item count cache after experimental trim The previous count would be invalid at this point. Should be possible to math out how many items are left, but this is left as future work.

mod_blocklist: Remove weak cache (and increase default LRU cache size) Weak tables are said to have suboptimal performance, so we might as well get replace it with an increased default LRU cache size. Sorry about the 'and'