Addition of tool to list hosts in a year

hosts_in_year.sqlite.sql: query to return all hosts contributing shows
    in a period (usually a year)

hosts_list.tpl: `TT²` template to generate an HTML list from the output
    of hosts_in_year.sqlite.sql

make_shownotes: trivial tidying

thanks_to_hosts: Bash script to simplify the generation of the HTML
    which thanks a year's hosts for their contributions

Community_News/hosts_list.tpl

@@ -0,0 +1,53 @@
+[%# ==========================================================================
+This is the TT2 file for making a list of hosts contributing to HPR in the
+current year which is run in conjunction with 'query2tt2'. It's invoked
+by using the Bash script 'thanks_to_hosts'.
+
+[We can't use the planned pure TT2 version since Template::Plugin::DBI
+can't run over the SSH tunnel.]
+
+The 'query2tt2' script needs a configuration file '.hpr_sqlite.cfg,' though this
+is the default.
+
+The file 'hosts_in_year.sqlite.sql' is used to generate the 'result' hash
+which is used by this template. The query needs to be given the first and last
+dates of the year.
+
+This template uses the variable 'year' which can be provided to 'query2tt2'
+using the option '-def year="$year"' or similar. If not provided the default
+value is the current year.
+
+The 'result' hash is sorted by host name. The loop which writes the output
+generates links to the HPR website, with 8 per list element
+
+Changes:
+-------
+2023-10-30: The correspondent URL has changed with the static site, and needs
+the hostid to be zero-padded.
+2025-01-01: We now use a copy of the live database, built from the HPR server
+and available as https://www.hackerpublicradio.org/hpr.sql. This is
+a MySQL/MariaDB dump which can be used to create a MariaDB or a SQLite copy.
+See the script collect_HPR_database for how the SQLite version is created.
+========================================================================== -%]
+[%- USE date -%]
+[%- DEFAULT
+    year = date.format(date.now,'%Y','UTC')
+-%]
+<h3>Thanks to all [% result.size %] HPR contributors in [% year %]!</h3>
+
+[% limit = 8 -%]
+[% count = 0 -%]
+<p><ul><li>
+[% FOREACH h = result -%]
+<a href="https://hackerpublicradio.org/correspondents/[% h.hostid %].html">[% h.hostname %]</a>
+[%- IF loop.count mod limit == 0 || loop.count == result.size -%].[% ELSE %],[% END %]
+[% count = count + 1 -%]
+[% IF count == limit -%]
+[% count = 0 -%]
+</li><li>
+[% END -%]
+[% END -%]
+</li></ul></p>
+[%#
+  # vim: syntax=tt2:ts=8:sw=4:ai:et:tw=78:fo=tcrqn21:fdm=marker
+-%]