Backport to v1.2 of PR 2266 2467 2663 (#2788)

* Only check at least one email gpg key (#2266)

* Only require one email (possibly not yet validated)

* Update message error and check validation of commit

* Add integrations tests

* Complete integration for import

* Add pre-check/optimization

* Add some test (not finished)

* Finish

* Fix fixtures

* Fix typo

* Don't guess key ID

* Make repo private to no interfere with other tests (#2467)

* GPG key email verification no longer case sensitive (#2661) (#2663)

* GPG key email verification no longer case sensitive (#2661)

* case insensitive GPG key email verification now cached (#2661)

Signed-off-by: Julian Scholle <julian.scholle@googlemail.com>

integrations/gitea-integration-meta/gitea-repositories/user2/repo16.git/hooks/applypatch-msg.sample

@@ -0,0 +1,15 @@
+#!/bin/sh
+#
+# An example hook script to check the commit log message taken by
+# applypatch from an e-mail message.
+#
+# The hook should exit with non-zero status after issuing an
+# appropriate message if it wants to stop the commit.  The hook is
+# allowed to edit the commit message file.
+#
+# To enable this hook, rename this file to "applypatch-msg".
+
+. git-sh-setup
+commitmsg="$(git rev-parse --git-path hooks/commit-msg)"
+test -x "$commitmsg" && exec "$commitmsg" ${1+"$@"}
+: