mod_admin_telnet: Reflow hosts filter for readability

Merge 0.11->trunk

mod_storage_sql: Move update limit check back one step, fixes traceback 0c00274528a4 moved it one step too far, so the check was performed before connecting to the database instead of after.

mod_ping: Fix double response to internal ping When responding to a ping from elsewhere in the same Prosody the send function will be host_send from core.hostmanager, which does not return anything. Tailcalling it therefore lets the iq event fall trough to handle_unhandled_stanza in core.stanza_router, which responds with an error. This error also goes into handle_unhandled_stanza which discards it. Noticed because I have a module that points out when a stanza error reply is created without a text argument.

Merge 0.11->trunk

mod_storage_sql: Fix check for deletion limits (fixes #1494) The check was only performed if sql_manage_tables was set to true (the default) It should always be performed

util.startup: Break out command line argument parsing into util.argparse This will allow using it from other places such as prosodyctl sub-commands and plugins

net.resolvers.service: Fix resolving of targets with multiple IPs Each basic resolver was only used once and not kept around to try any IP addresses but the first one found.

net.server_epoll: Reduce log level of TLS handshake errors to debug These are triggered all the time by random HTTPS connections, so they are mostly just useless noise. When you actually do need them, you probably have debug logging enabled too, since these messages are fairly useless without more context.

mod_s2s: Fix typo in comment [codespell]