let comma_sep = del /,[ \t]*/ ", "
let realm_entry = [ label "user" . [ label "username" . store Rx.word ] . del /[ \t]*:[ \t]*/ ": " . [ label "password" . store Rx.word ] . [ label "realm" . comma_sep . store Rx.word ]* . Util.eol ]
let lns = ( Util.comment | Util.empty | realm_entry )*