util.prosodyctl.shell: Fix for missing 'sep' arg to string.rep in Lua 5.1
-- TODO s/number/integer/ once Teal gets support for thatlocalrecordlibdate:function(t:integer):stringdatetime:function(t:integer):stringtime:function(t:integer):stringlegacy:function(t:integer):stringparse:function(t:string):integerendreturnlib