util.human.io: Add parse_duration() method to parse a duration string Similar logic occurs throughout various modules in the codebase. We might even want a module:get_option_duration()??

mod_admin_shell: Allow "*" as substitute for 'nil' for easier CLI usage Since prosodyctl shell with additional arguments assumes the first two are a section:command() and any following arguments are strings, passing a bare 'nil' is not possible. In order to avoid delving into this rabbit hole, instead produce a token that alone is not really a legal JID for use as wildcard.

util.prosodyctl.shell: Fix sending terminal width with single argument E.g. when you do 'prosodyctl shell "s2s:show()"', this is the case that triggers, and it was missing the @width argument, causing confusion.

util.human.io: Coerce $COLUMNS to number os.getenv() returns a string but term_width() should return a number

util.prosodyctl.shell: Coerce terminal width to string (for util.stanza) Fixes invalid attribute value: expected string, got number

util.human.io: table: don't read $COLUMNS directly, just use term_width() ...which now reads $COLUMNS for us and does the right thing.

util.human.io: table: Return determined width as a second result This allows callers to adjust other things based on the width of the rows (such as header lines).

util.human.io: Prefer using the $COLUMNS environment variable if set (by readline) Feels like it should be faster.

util.prosodyctl.shell: Use new term_width() for width Kicks in if/when readline hasn't set $COLUMNS, e.g. when using the `prosodyctl shell command like this` form.

util.human.io: table: use term_width() to discover terminal width