Suport autoupdate of multiple urls

[Ash258]

When autoupdating manifests, binary should be able to update multiple files in manifest.

Example manifest

I have manifest with custom powershell scripts. One is main with version (for checkver) and second is just file, for which i want to calculate hashes too.

There should be option like this:

"autoupdate": {
    "url": [
        "https://gist.githubusercontent.com/Ash258/e143436e2f9183a650424d635b535e51/raw/PostInstall.ps1",
        "https://gist.githubusercontent.com/Ash258/e143436e2f9183a650424d635b535e51/raw/PostInstall.User.ps1"
    ]
}

Now when make autoupdate.url an array. Result of checkver is this (it merge both urls into one):

"url": [
    "https://gist.githubusercontent.com/Ash258/e143436e2f9183a650424d635b535e51/raw/PostInstall.ps1 https://gist.githubusercontent.com/Ash258/e143436e2f9183a650424d635b535e51/raw/PostInstall.User.ps1",
    "https://gist.githubusercontent.com/Ash258/e143436e2f9183a650424d635b535e51/raw/PostInstall.User.ps1"
],
"hash": [
    "75269e9878d1b7238720b29285e0370df46afc59f14a7c51e10031613f9ffb1d",
    "75269e9878d1b7238720b29285e0370df46afc59f14a7c51e10031613f9ffb1d"
],

Now I handle it with custom checkhashes binary (#2766)

[Ash258]

Duplicate of #2176