mod_admin_shell: module:info: Show module status

mod_admin_shell: Add basic command that shows more info about loaded modules To show info about loaded modules. Inspired by the desire to know whether a module was loaded from the core set or 3rd party.

util.openmetrics: Use pack from util.table, detect appropriate unpack for Lua 5.1 (thanks sups)

mod_turn_external: Simple module to offer TURN(+STUN) via mod_external_services

core.portmanager: Also reload per-SNI certificates

core.portmanager: Reload direct TLS certificates after config reload This should re-create all contexts the same way as when the service was activated, which reloads certificates.

core.portmanager: Factor out base TLS context creation for reuse Thinking I can use this to reload certificates after config reload

net.server_epoll: Add missing method for changing TLS context Supported by the other net.server implementations already, but not used anywhere in Prosody.

mod_http_file_share: Build list of measuring buckets for configured size limit Creates buckets up to the configured size limit or 1TB, whichever is smaller, e.g. {1K, 4K, 16K, ... 4M, 16M}

util.openmetrics: Prettify format of histogram buckets "%g" turns 1GB into 1.07374e+09, which is a bit awkward for the bytes measurements IMO. Turning up the precision, at "%.17g" turns 0.1 into 0.10000000000000001 while "%0.16" gives 0.1, hiding most of those pesky floating point artefacts. Lua version 5.2 uses "%.14g" ( see LUA_NUMBER_FMT in luaconf.h.html ) so it seems like a sensible choice here.