open https://gitlab.synchro.net/main/sbbs/-/issues/277

If I run, for example,
`./jsexec ./msgutil.js -hdrs mail` (Ubuntu Linux/SBBS 18c) or
`.\jsexec.exe .\msgData.js -hdrs mail` (Windows 10/SBBS 19c (bleeding edge overnight build 27 June 2021)
I get the same result, that is that the headers of the Netmails are printed correctly for all fields up to `can_read = true`. The next field is `get_rfc822_header =` but after the = sign, instead of printing the rfc822 header, the contents of `load/822header.js` is printed out in it's entirety for each record.
Using the param `-index` or `-export` work as expected.

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Re: msgutil.js prints the contents of the script rather than it's outpu
By: John Dovey to GitLab issue in main/sbbs on Mon Jun 28 2021 16:13:05

`.\jsexec.exe .\msgData.js -hdrs mail` (Windows 10/SBBS 19c (bleeding edge

FYI, I edited this to fix the finger trouble in the windows cmd.. :-)
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* El Gato de Fuego (The Fire Cat) 4:920/69 * Pedasi, Panama

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