fix creation webcookeis for EAuthTokenPlatformType.WebBrowser

[Sadzurami]

Valve (again) change web authorization. Now we have different cookies for all subdomains.

Eg. cookies from steamcommunity.com now we can't use for store.steampowered.com, etc.
New access token audience:

store.steampowered.com

"aud": [
    "web:store"
]

steamcommunity.com

"aud": [
    "web:community"
]

Only fair for creation cookies with EAuthTokenPlatformType.WebBrowser.
EAuthTokenPlatformType.SteamClient and EAuthTokenPlatformType.MobileApp still creates cookies with common audience:

"aud": [
    "web",
    "mobile"
]

So, will be better to return full cookies strings with Domain attribute.
Will require some changes on client side, but popular packages that maintain cookies (CookieJar) automatically can use full and short variants.

[DoctorMcKay]

Dammit, Valve.

Are you ready for this to be merged?

[Sadzurami]

Dammit, Valve.

Are you ready for this to be merged?

ready

[DoctorMcKay]

getWebCookies is actually returning an array of arrays, will fix this.

[DoctorMcKay]

Technically, the access_token returned in PollAuthSessionResponse is still valid for "web", but Valve has already removed that token once before so probably best not to rely on it.

[Sadzurami]

getWebCookies is actually returning an array of arrays, will fix this.

Sorry for that and thanks for quick fix

[Sadzurami]

in 1.7.2 release message there is typo
(with ; Domain=steamcommunity.com appended in the cookie string)

may be misunderstanding, better change to smth like
(with ; Domain=<some-steam-domain> appended in the cookie string)