splice: add "for now" to "Don't support wallet funding being used for fee"

[hMsats]

CLN v25.05

Did a splice with a script and it was easy and worked beautifully!

However, I was very confused by the error message when trying to add a fee (rate) like in the docs:

lightning-cli dev-splice script_or_json="wallet -> 37602sat+fee@2000; 37602sat -> 00e8fa5f98228486a276abaa8e970d3b8433ff8afc7950f78973e5ead9078124" dryrun=true
{
   "code": -32602,
   "message": "Don't support wallet funding being used for fee"
}

a "for now" would have cleared it all up.

In plugins/spender/splice.c around line 1285

add "for now" also to:

"Don't support wallet funding"
" being used for fee");

and possibly somewhere else.

BTW: these messages are easier to find in the code (for example with ag) if they are on the same line:

"Don't support wallet funding being used for fee");