Update soon to be expired crl

Update crl.pem, as it will expire on November 25 2019.
Resolves #2357.
diff --git a/tests/data_files/test-ca.server1.db b/tests/data_files/test-ca.server1.db
new file mode 100644
index 0000000..3c0e012
--- /dev/null
+++ b/tests/data_files/test-ca.server1.db
@@ -0,0 +1,2 @@
+R	210212144406Z	110212124407Z	01	unknown	/C=NL/O=PolarSSL/CN=PolarSSL Server 1
+R	210212144400Z	110212124407Z	03	unknown	/C=NL/O=PolarSSL/CN=PolarSSL Test CA