Add test for limit on intermediate certificates

Inspired by test code provided by Nicholas Wilson in PR #351.

The test will fail if someone sets MAX_INTERMEDIATE_CA to a value larger than
18 (default is 8), which is hopefully unlikely and can easily be fixed by
running long.sh again with a larger value if it ever happens.

Current behaviour is suboptimal as flags are not set, but currently the goal
is only to document/test existing behaviour.
diff --git a/tests/data_files/dir-maxpath/03.crt b/tests/data_files/dir-maxpath/03.crt
new file mode 100644
index 0000000..7d90a5e
--- /dev/null
+++ b/tests/data_files/dir-maxpath/03.crt
@@ -0,0 +1,12 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----