Don't expand the @HOST@ keyword within the "service_url" value, after
all. The code didn't cope with an undefined "service_url", and the
@HOST@ expansion probably isn't too useful there, anyway.
Replace @HOST@ with the virtual host name if the keyword is specified
within the "put_url", "get_url", and/or "service_url" values. Also,
replace @HOME@ with the home directory of the user running ejabberd if
this keyword is specified within the "docroot" value.
Holger Weiss