- Added extra X509 regression and coverage tests

diff --git a/tests/data_files/crl_sha1.pem b/tests/data_files/crl_sha1.pem
new file mode 100644
index 0000000..093e790
--- /dev/null
+++ b/tests/data_files/crl_sha1.pem
@@ -0,0 +1,11 @@
+-----BEGIN X509 CRL-----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=
+-----END X509 CRL-----