"*Whether to generate X-Hashcash: headers.
If t, always generate hashcash headers. If `opportunistic',
only generate hashcash headers if it can be done without the user
waiting (i.e., only asynchronously).
You must have the \"hashcash\" binary installed, see `hashcash-path'."
"*Whether to generate X-Hashcash: headers.
If t, always generate hashcash headers. If `opportunistic',
only generate hashcash headers if it can be done without the user
waiting (i.e., only asynchronously).
You must have the \"hashcash\" binary installed, see `hashcash-path'."