* src/cuirass/remote.scm (zmq-message-receive*): New procedure.
* src/cuirass/remote-server.scm (start-fetch-worker, zmq-start-proxy): Use it.

* src/cuirass/remote-server.scm (zmq-start-proxy): Use copies of message
contents.

* src/cuirass/remote-server.scm (zmq-start-proxy): Print a warning if the poll
loop is blocked for more than 5 seconds.

* src/cuirass/remote-server.scm (start-fetch-worker): Use the message API.

* src/cuirass/database.scm (db-add-build-product): Ignore duplicated
BuildProducts.

* src/cuirass/database.scm (db-remove-unresponsive-workers): Restart the
builds that are started on unresponsive workers.
* tests/database.scm ("db-remove-unresponsive-workers"): Test it.

* src/cuirass/notification.scm (notification-email, notification-mastodon):
Catch notification errors.

* src/cuirass/remote-server.scm (run-fetch): Add log message.

src/cuirass/notification.scm (notification-text): Keep it on one line.

* src/cuirass/mail.scm (mu-debug): Remove it.
* src/cuirass/utils.scm (mu-debug): Ditto.
* src/cuirass/parameters.scm (mu-debug): New variable.
* src/cuirass/remote-server.scm (start-fetch-worker): Force parameters module
load.
* tests/database.scm: Load parameters module.

* src/cuirass/zabbix.scm (%zabbix-uri): Remove it.
(zabbix-available?): Replace %zabbix-uri by %zabbix-url.

* tests/database.scm (mu-debug): Move to ...
* src/cuirass/utils.scm: ... here.

* src/schema.sql: Reorder fields.
* src/cuirass/database.scm (db-get-specifications): Ditto.

* src/cuirass/parameters.scm (%mastodon-instance-name, %mastodon-instance-url,
%mastodon-instance-token): New variables.
* src/cuirass/mastodon.scm (send-status): Remove "instance-name",
"instance-url" and "instance-token" parameters.
* src/cuirass/notification (notification-mastodon): Adapt accordingly.

* src/cuirass/database.scm (db-add-specification): Make notifications field
optional.

* src/cuirass/parameters.scm: New file.
* Makefile.am (dist_pkgmodule_DATA): Add it.
* bin/cuirass.in: Add "parameters" argument.
* src/cuirass/base.scm (read-parameters): New procedure.
* src/cuirass/notification.scm (build-details-url): New procedure.
(notification-text): Use it.
* src/cuirass/rss.scm (build-details-url): New procedure.
(build->rss-item): Use it.
(rss-feed): Remove "base-url" argument.
* src/cuirass/remote-server.scm: Add "parameters" argument.
* src/cuirass/zabbix.scm (%zabbix-uri, %zabbix-uri, %zabbix-password): Remove
them.
(zabbix-request, zabbix-login): Adapt accordingly.

* src/cuirass/mastodon.scm: New file.
* Makefile.am (dist_pkgmodule_DATA): Add it.
* src/cuirass/notification.scm (notification-type): Add "mastodon".
(notification-mastodon): New procedure.
(send-notifications): Add it.

* src/cuirass/mail.scm: New file.
* src/cuirass/notification.scm: New file.
* src/sql/upgrade-5.sql: New file.
* Makefile.am (dist_pkgmodule_DATA, dist_sql_DATA): Add them.
* src/schema.sql (Specifications)[notifications]: New field.
* bin/cuirass.in: Wrap inside the "with-notification" macro.
* src/cuirass/remote-server.scm (remote-server): Ditto.
* src/cuirass/database.scm (db-add-specification): Add notifications field.
(db-get-specifications): Ditto.
(db-update-build-status!): Send notifications.
* tests/mail.sh: New file.
* tests/database.scm (mu-debug, tmp-mail): New variables.
(mailer): New procedure.
(example-spec): Add an email notification.
("mail-notification"): New test case.

* src/cuirass/rss.scm (date->rfc822-str): Move it to ...
* src/cuirass/utils.scm: ... here.

* Makefile.am (dist_images_DATA): Update it.

* src/static/images/icon.svg: Remove it.
* src/cuirass/http.scm (%file-white-list): Remove "images/icon.svg".
* src/cuirass/templates.scm (html-page): Remove icon.svg link.

* src/cuirass/http.scm (%file-white-list): Rename "logo.png" into "guix.png".
Add "icon.png" and "icon.svg".
* src/cuirass/templates.scm (html-page): Adapt it.
* src/static/images/logo.png: Rename it ...
* src/static/images/guix.png: ... into this file.
* src/static/images/icon.png: New file.
* src/static/images/icon.svg: New file.

* src/cuirass/templates.scm (build-details, evaluation-info-table): Add lock
icons for admin actions.

* src/cuirass/templates.scm: Remove the evaluation restart dropdown arrow.
* src/static/css/cuirass.css (no-dropdown-arrow): New rule.

* src/cuirass/http.scm (url-handler): New route
"/admin/evaluation/<id>/restart".
* src/cuirass/templates.scm (evaluation-info-table): Add an evaluation restart
button.

* src/cuirass/database.scm (db-restart-evaluation!): New procedure.
* tests/database.scm (db-restart-evaluation!): New test.

* src/cuirass/templates.scm (build-details): Allow unconditionnal build
restart.

* src/cuirass/http.scm (url-handler): New route "/admin/build/<id>/restart".
* src/cuirass/template.scm (build-details): Add a "restart" button.

* src/cuirass/database.scm (db-restart-build!): New procedure.
* tests/database.scm (db-restart-build!): New test.

* src/cuirass/remote-server.scm (remote-server): Move the locale setup to the
publish thread.
* src/cuirass/remote-worker.scm (remote-worker): Ditto.
* src/cuirass/remote.scm (publish-server): Set the locale.

* src/cuirass/remote-server.scm (remote-server): Use a default locale.
* src/cuirass/remote-worker.scm (remote-worker): Ditto.

* src/cuirass/database.scm (db-register-builds): Remove commentary.

* tests/database.scm (%dummy-worker): Fix tests.

* src/cuirass/templates.scm (machine-status): Pick the first worker build if
multiple builds are started on the same worker.

* src/cuirass/database.scm (db-get-build-percentage): Consider both successful
and failing builds.

* src/cuirass/remote.scm (zmq-server-info, zmq-worker-request-info-message):
New procedures.
* src/cuirass/remote-server.scm (%log-port, %publish-port): New parameters.
(read-worker-exp): Handle 'worker-request-info message.
(remote-server): Set the new parameters.
* src/cuirass/remote-worker.scm (start-worker): Rename "server" argument. Send
a 'worker-request-info message to discover the server log port and publish
port.
(remote-worker): Adapt it.

bin/cuirass.in (%options): Fix "zabbix-uri" argument.

* bin/cuirass.in: Add "--zabbix-uri" argument.
* src/cuirass/zabbix.scm (%zabbix-uri): Export it.