doc: update reference to the mailing lists

Change references to the mailing list to the VTK Discourse forum.

CONTRIBUTING.md

@@ -60,7 +60,7 @@ patches before they are merged.
 
 Our [Wiki] is used to document features, flesh out designs and host other
 documentation. Our API is documented using [Doxygen] with updated
-documentation generated nightly. We have several [Mailing Lists]
+documentation generated nightly. We have a [VTK Discourse] forum
 to coordinate development and to provide support.
 
 [VTK Git README]: Documentation/dev/git/README.md
@@ -76,4 +76,4 @@ to coordinate development and to provide support.
 
 [Wiki]: http://www.vtk.org/Wiki/VTK
 [Doxygen]: http://www.vtk.org/doc/nightly/html
-[Mailing Lists]: http://www.vtk.org/VTK/help/mailing.html
+[VTK Discourse]: https://discourse.vtk.org/

Documentation/Doxygen/ArrayDispatch-VTK-7-1.md

@@ -1274,4 +1274,6 @@ restrictions are not met.
 Hopefully this has convinced you that the `vtkArrayDispatch` and related tools
 are worth using to create flexible, efficient, typesafe implementations for
 your work with VTK. Please direct any questions you may have on the subject to
-the VTK mailing lists.
+the [VTK Discourse][] forum.
+
+[VTK Discourse]: https://discourse.vtk.org

Documentation/dev/git/dashboard.md

@@ -42,4 +42,7 @@ Make your edits, test it, and commit the result.  Create a patch file with:
 
     $ git format-patch origin/dashboard
 
-And email the results to the developer's mailing list.
+And post the results in the [Development][] category in the [VTK Discourse][] forum.
+
+[Development]: https://discourse.vtk.org/c/development
+[VTK Discourse]: https://discourse.vtk.org/

Documentation/maint/release.md

@@ -22,12 +22,12 @@ another for rc1). Plausible deadlines should be used; they can be edited later.
 
 ### Annoucements
 
-Announcements should be sent to developers first and Linux distribution
+Announcements should be posted on the [VTK Discourse][] forum and Linux distribution
 maintainers.
 
-#### Mailing List
+#### VTK Community Announcement
 
-Announce to the developer list (vtk-developers@vtk.org) that a release is being
+Announce to the [Development][] category that a release is being
 planned. Template:
 
     Hi,
@@ -341,3 +341,6 @@ Send an email to `vtk-developers@vtk.org`, `vtkusers@vtk.org`. Also inform
 
 For the final release, a blog post, release notes, and a Source article should
 be made.
+
+[VTK Discourse]: https://discourse.vtk.org
+[Development]: https://discourse.vtk.org/c/development

Examples/GUI/Cocoa/Documentation/Instructions.rtf

@@ -52,8 +52,8 @@ Now you should be able to build the project!\
 \
 The code has many comments, and hopefully they will answer any questions you may have.\
 \
-If you have any problems, please post to the vtkusers mailing list.\
-<{\field{\*\fldinst{HYPERLINK "https://public.kitware.com/mailman/listinfo/vtkusers"}}{\fldrslt https://public.kitware.com/mailman/listinfo/vtkusers}}>\
+If you have any problems, please post to the VTK Discourse forum.\
+<{\field{\*\fldinst{HYPERLINK "https://discourse.vtk.org"}}{\fldrslt https://discourse.vtk.org}}>\
 \
 \ul \ulc0 Version History:\
 \ulnone \
@@ -153,4 +153,4 @@ Changes in 1.1 (since 1.0)\
 - minor code cleanup\
 - added call to print out any leaking vtk objects\
 - linked to Ryan Glover's great instructions on how to build vtk\
-}
\ No newline at end of file
+}

Examples/README.txt

@@ -55,10 +55,10 @@ Additional Resources
 * The VTK Testing directories (e.g., VTK/Graphics/Testing) contain other
   examples. These are not commented, and designed for testing.
 
-* The VTK Mailing List http://public.kitware.com/mailman/listinfo/vtkusers
+* The VTK Discourse forum http://discourse.vtk.org/
 
-* The VTK Web Pages http://public.kitware.com/
+* The VTK Web Pages https://vtk.org/Wiki/VTK
 
 * Commercial support and resources from Kitware:
-  - The VTK User's Guide http://www.kitware.com/products/vtkguide.html
-  - Support Contracts http://www.kitware.com/products/vtksupport.html
+  - The VTK User's Guide https://vtk.org/documentation/
+  - Support Contracts https://www.kitware.com/what-we-offer/#support

Parallel/MPI/vtkMPICommunicator.cxx

@@ -123,7 +123,7 @@ inline MPI_Datatype vtkMPICommunicatorGetMPIType(int vtkType)
     case VTK_ID_TYPE:           return MPI_LONG_LONG;
 #else
     case VTK_ID_TYPE:
-      vtkGenericWarningMacro("This systems MPI doesn't seem to support 64 bit ids and you have 64 bit IDs turned on. Please contact VTK mailing list.");
+      vtkGenericWarningMacro("This systems MPI doesn't seem to support 64 bit ids and you have 64 bit IDs turned on. Please seek assistance on the VTK Discourse (https://discourse.vtk.org/).");
       return MPI_LONG;
 #endif
 #else //VTK_USE_64BIT_IDS

README.md

@@ -26,7 +26,7 @@ Learning Resources
 
 * General information is available at the [VTK Homepage][].
 
-* Community discussion takes place on the [VTK Mailing Lists][].
+* Community discussion takes place on the [VTK Discourse][] forum.
 
 * Commercial [support][Kitware Support] and [training][Kitware Training]
   are available from [Kitware][].
@@ -34,9 +34,9 @@ Learning Resources
 * Doxygen-generated nightly reference documentation is
   available [online][Doxygen].
 
-[VTK Homepage]: https://www.vtk.org
+[VTK Homepage]: https://www.vtk.org/
 [Doxygen]: https://www.vtk.org/doc/nightly/html
-[VTK Mailing Lists]: https://www.vtk.org/mailing-lists/
+[VTK Discourse]: https://discourse.vtk.org/
 [Kitware]: https://www.kitware.com/
 [Kitware Support]: https://www.kitware.com/what-we-offer/#support
 [Kitware Training]: https://www.kitware.com/what-we-offer/#training
@@ -48,7 +48,7 @@ If you have found a bug:
 
 1. If you have a patch, please read the [CONTRIBUTING.md][] document.
 
-2. Otherwise, please join the one of the [VTK Mailing Lists][] and ask
+2. Otherwise, please join the [VTK Discourse][] forum and ask
    about the expected and observed behaviors to determine if it is
    really a bug.
 

ThirdParty/UPDATING.md

@@ -116,5 +116,7 @@ subdirectory using the `subtree` merge strategy.
 
 Initial conversions will require a manual push by the maintainers since the
 conversion involves a root commit which is not allowed under normal
-circumstances. Please send an email to the mailing list asking for assistance
-if necessary.
+circumstances. Please post a message on the [VTK Discourse][] forum asking
+for assistance if necessary.
+
+[VTK Discourse]: https://discourse.vtk.org/

Utilities/Doxygen/doc_version.pl

@@ -173,8 +173,7 @@ print DEST_FILE
   "  \@par Useful links:\n",
   "  \@li VTK Home: http://www.vtk.org\n",
   "  \@li VTK Source: https://gitlab.kitware.com/vtk/vtk\n",
-  "  \@li VTK Users Mailing List: http://www.vtk.org/mailman/listinfo/vtkusers\n",
-  "  \@li VTK Developer Mailing List: http://www.vtk.org/mailman/listinfo/vtk-developers\n",
+  "  \@li VTK Discourse Forum: https://discourse.vtk.org\n",
   "  \@li VTK FAQ: http://www.vtk.org/Wiki/VTK_FAQ\n",
   "  \@li VTK Wiki: http://www.vtk.org/Wiki/\n",
   "  \@li VTK Dashboard: http://www.cdash.org/CDash/index.php?project=VTK\n",