- Added extra X509 regression and coverage tests

diff --git a/tests/data_files/crl_sha256.pem b/tests/data_files/crl_sha256.pem
new file mode 100644
index 0000000..53cdb63
--- /dev/null
+++ b/tests/data_files/crl_sha256.pem
@@ -0,0 +1,11 @@
+-----BEGIN X509 CRL-----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=
+-----END X509 CRL-----