- Added extra X509 regression and coverage tests

diff --git a/tests/data_files/crl_md5.pem b/tests/data_files/crl_md5.pem
new file mode 100644
index 0000000..a3f9323
--- /dev/null
+++ b/tests/data_files/crl_md5.pem
@@ -0,0 +1,11 @@
+-----BEGIN X509 CRL-----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=
+-----END X509 CRL-----