Search for :file:`{NAME}.cfg` and :file:`{NAME}.site.cfg` when searching for
test suites, instead of :file:`lit.cfg` and :file:`lit.site.cfg`.
-.. option:: --param NAME, --param NAME=VALUE
+.. option:: -D NAME, -D NAME=VALUE, --param NAME, --param NAME=VALUE
Add a user defined parameter ``NAME`` with the given ``VALUE`` (or the empty
string if not given). The meaning and use of these parameters is test suite