reopen
https://gitlab.synchro.net/main/sbbs/-/issues/840
`js.exec()` is documented as returning a number, but even though I used it to invoke a script that called `exit(0)` or `exit(1)`, `js.exec()` always returned `undefined`.
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* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)