[Bug 50094] New: Rockstar Games Launcher installer hyperlinks don't work

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50094

Bug ID: 50094
           Summary: Rockstar Games Launcher installer hyperlinks don't
                    work
           Product: Wine
           Version: 5.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

The Rockstar Games Launcher installer (NSIS-based) contains hyperlinks which do
nothing when clicked.

The NSIS script does the following:
- fetches the content of
HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice\ProgId
- take that value and get the content of HKCR$value\shell\open\command
- concatenate the URL after that command, and execute it

Two fixes are needed: one to add the UrlAssociations keys, and one for
winebrowser to handle URLs which are missing a scheme (i.e. 'http://')

HKCU\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\http\UserChoice\ProgId
needs to be set to 'http'.
HKCR\http\shell\open\command is already set to
'"C:\windows\system32\winebrowser.exe" -nohome'.

With a UrlAssocations key for http added, "C:\windows\system32\winebrowser.exe"
www.rockstargames.com/eula is what gets executed.
But xdg-open on Linux requires URLs to have a scheme, and fails unless changes
are made to winebrowser.