Update qubes-users references to /support/

Now that we have a user forum in addition to qubes-users, it makes more
sense to link to /support/ than to link directly to qubes-users (or to
the forum, for that matter). This layer of redirection means allows us
to update just one thing (namely, the /support/ page) instead of having
to hunt through all the documentation every time support information
changes.

user/downloading-installing-upgrading/installation-guide.md

@@ -325,13 +325,14 @@ Getting Help
 ------------
 
  * We work very hard to make the [documentation] accurate, comprehensive useful and user friendly. 
- We urge you to read it! It may very well contain the answers to your questions. 
- (Since the documentation is a community effort, we'd also greatly appreciate your help in [improving] it!)
+   We urge you to read it! It may very well contain the answers to your questions. 
+   (Since the documentation is a community effort, we'd also greatly appreciate your help in [improving] it!)
 
- * If you don't find your answer in the documentation, it may be time to consult the [mailing lists], as well as the many other available sources of [help].
+ * If you don't find your answer in the documentation, please see [Help, Support, Mailing Lists, and Forum] for places to ask.
+
+ * Please do **not** email individual members of the Qubes team with questions about installation or other problems. 
+   Instead, please see [Help, Support, Mailing Lists, and Forum] for appropriate places to ask questions.
 
- * Please do not email individual developers (Marek, etc.) with questions about installation or other problems. 
- Please send all such questions to the appropriate mailing list.
 
 [QSB #46]: /news/2019/01/23/qsb-46/
 [system requirements]: /doc/system-requirements/
@@ -346,6 +347,5 @@ Getting Help
 [Rufus]: https://rufus.akeo.ie/
 [documentation]: /doc/
 [improving]: /doc/doc-guidelines/
-[mailing lists]: /support/
-[help]: /help/
+[Help, Support, Mailing Lists, and Forum]: /support/
 

user/downloading-installing-upgrading/upgrade/upgrade-to-r4.0.md

@@ -44,7 +44,7 @@ Backup R3.2
 
 7. If your backup verifies successfully, proceed to the next section.
    If it does not, **stop**.
-   Go back and repeat the backup steps, review the documentation or search the qubes-users mailing list, or ask for assistance on the [qubes-users mailing list](/support/#qubes-users) or IRC.
+   Go back and repeat the backup steps, review the documentation, and ask for [help].
 
 
 Install R4.0
@@ -62,7 +62,7 @@ For further details, please see the [installation guide](/doc/installation-guide
    If you did not successfully verify your backup in the previous section, cancel the installation, and go back to do that now. 
 
 3. Complete the R4.0 installation.
-   Ask for assistance on the [qubes-users mailing list](/support/#qubes-users) if you run into trouble.
+   Ask for [help] if you run into trouble.
 
 4. If you are unable to successfully install R4.0 on your system, all is not lost.
    Use the R3.2 installer to reinstall R3.2, then restore from your backup.
@@ -119,3 +119,6 @@ Please see [Supported Versions](/doc/supported-versions/) for information on sup
  * [Upgrading Debian TemplateVMs](/doc/templates/debian/#upgrading)
  * [Updating Whonix TemplateVMs](https://www.whonix.org/wiki/Qubes/Update)
 
+
+[help]: /support/
+

user/downloading-installing-upgrading/version-scheme.md

@@ -39,11 +39,11 @@ production. You may ask for support on mailing lists (specifically
 When enough development has been made, we announce the first stable version,
 like e.g. `3.0.0` (i.e. without `-rc`). This version is considered stable and
 we support it for some period. Core components are branched at this moment and
-bugfixes are backported from master branch. Questions about stable release
-should be directed to the **qubes-users** mailing list. No major features and
-interface incompatibilities are to be included in this release. We release
-bugfixes as `3.0.1`, `3.0.2` and so on, while new features come into the next
-release e.g. `3.1-rcX`.
+bugfixes are backported from master branch. Please see [Help, Support, Mailing
+Lists, and Forum] for places to ask questions about stable releases. No major
+features and interface incompatibilities are to be included in this release. We
+release bugfixes as `3.0.1`, `3.0.2` and so on, while new features come into the
+next release e.g. `3.1-rcX`.
 
 Tickets in the tracker are sorted out by release major.minor, such as `3.0`,
 `3.1` (trac calls this “milestone”).
@@ -155,3 +155,7 @@ Check installed version
 
 If you want to know which version you are running, for example to report
 an issue, you can either check in the Qubes Manager menu under About / Qubes OS  or in the file /etc/qubes-release in dom0. For the latter you can use a command like `cat /etc/qubes-release` in a dom0 terminal.
+
+
+[Help, Support, Mailing Lists, and Forum]: /support/
+