Remove all traces of a social network that has gone rogue (#989)

Author: rouault

_templates/indexsidebar.html

@@ -8,7 +8,7 @@ <h3>Navigation</h3>
 <a href="{{ pathto('documentation') }}" title="Documentation">Documentation</a><br>
 <a href="{{ pathto('faq') }}" title="FAQ">FAQ</a><br>
 <a href="{{ pathto('psc') }}" title="PSC">PSC</a><br>
-<a href="https://twitter.com/mapserver_osgeo" title="Twitter" target="_blank">Twitter</a>
+<a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon" target="_blank">Masstodon</a>
 </p>
 <a href="https://www.osgeo.org/" target="_blank">
     <img src="{{ pathto("_static/OSGeo_project.png", 1) }}" alt="OSGeo" border="0px; text-decoration:none" />

_templates/layout.html

@@ -19,7 +19,7 @@ <h4 class="ribbon">DOCS PREVIEW</h4>
       <a href="https://github.com/mapserver/mapserver/issues/" title="Issue Tracker (MapServer core)">Issue Tracker</a> |
       <a href="{{ pathto('community/service_providers') }}" title="Professional Service Providers">Service Providers</a> |      
       <a href="{{ pathto('faq') }}" title="Frequently Asked Questions">FAQ</a> |
-      <a href="https://twitter.com/mapserver_osgeo" title="Twitter" target="_blank">Twitter</a> |
+      <a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon" target="_blank">Masstodon</a> |
       <a href="{{ pathto('download') }}" title="Download Source or Binaries">Download </a> |
       <a class="badge" href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KRJ2X44N3HA6U&source=url" target="_blank">
         <img src="https://img.shields.io/badge/donate-%E2%9D%A4%C2%A0-ff69b4.svg?style=flat" alt="Donate to MapServer">

_templates/sidebar2.html

@@ -8,5 +8,5 @@ <h3>Navigation</h3>
 <a href="{{ pathto('documentation') }}" title="Documentation">Documentation</a><br>
 <a href="{{ pathto('faq') }}" title="FAQ">FAQ</a><br>
 <a href="{{ pathto('psc') }}" title="PSC">PSC</a><br>
-<a href="https://twitter.com/mapserver_osgeo" title="Twitter">Twitter</a>
+<a href="https://mastodon.social/@mapserver@fosstodon.org" title="Mastodon">https://mastodon.social/@mapserver@fosstodon.org</a>
 </p>

en/input/vector/flatgeobuf.txt

@@ -31,10 +31,7 @@ chosen formats for streaming spatial data through HTTP / "the cloud".
 More Information
 ----------------
 
-More information about FlatGeobuf is available at:
-
-* GitHub repository: https://github.com/flatgeobuf/flatgeobuf
-* Twitter: https://twitter.com/flatgeobuf
+More information about FlatGeobuf is available at https://github.com/flatgeobuf/flatgeobuf
 
 File listing
 --------------

translated/ar/index.po

@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26

translated/cs/index.po

@@ -40,7 +40,7 @@ msgid ""
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26

translated/de/index.po

@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26

translated/el/index.po

@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26

translated/es/index.po

@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26

translated/fr/index.po

@@ -29,7 +29,7 @@ msgid "The MapServer :ref:`Project Steering Committee (PSC)<psc>`, sanctioned by
 msgstr ""
 
 #: ../../../en/index.txt:24
-msgid "Follow MapServer on `Twitter <https://twitter.com/mapserver_osgeo/>`__"
+msgid "Follow MapServer on `Fosstodon <https://fosstodon.org/@mapserver@fosstodon.org>`__"
 msgstr ""
 
 #: ../../../en/index.txt:26