On Wed, Apr 22, 2020 at 12:10 PM Yann Ylavic <ylavic....@gmail.com> wrote: > > > ':' > > This one looks special already in ap_resolve_env(), though it's > forbidden in Define so that may be it.
I'm afraid ':' will collide with mod_rewrite's "${mapname:key|default}" syntax for RewriteMap. Same goes for '|' it seems, naming discussion still open :) bash uses '=' for the default value too, looks quite readable/meaningful to me..