User-emu documentation mentions inexistent "runtime" downloads

[Mingye Wang]

The official documentation for the user-space emulator[1] contains many references to binary blobs no longer provided by QEMU.org for download. The parts mentioning them should be rephrased to avoid confusion and instructions for building these components should be provided (maybe as a reference to the LFS book with some scripts, or... cut a deal with some super slim Linux distros). The specific parts are:

* qemu-XXX-i386-wine.tar.gz, a wine build under the prefix /wine.
* qemu-runtime-i386-XXX-.tar.gz, a glibc build.

  [1]: https://www.qemu.org/docs/master/user/main.html

In addition, the documentation contains many other instances of inexistent "tar.gz" files, such as in "Network emulation". Most of these are inherited from the days of texi documentation more than 10 years ago, and they are so old that GitHub's blame have become unreliable. Someone really should run `fgrep -r 'tar.gz' doc' on the QEMU source tree.

The issue was previously reported as [2], but nobody bother enough to google the filename to find out where the confused user got the idea from.

  [2]: https://<email address hidden>/msg569174.html

[Peter Maydell (pmaydell)]

This patch removes the whole 'quick start' section from the user mode manual, including the references to the outdated tarballs: https://<email address hidden>/

[Thomas Huth (th-huth)]

FWIW, seems like Peter's patch got included here:
https://gitlab.com/qemu-project/qemu/-/commit/5b30c53041d8f4c26ed3cf
... but I guess we still need a patch for the Networking section?

[Thomas Huth (th-huth)]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/560