message: doc: describe how to pass wildcard names to test runner
diff: @@ -49,6 +49,29 @@ You can run any combination (incl. duplicates) of tests by calling:
  test/functional/test_runner.py <testname1> <testname2> <testname3> ...
  ```
  +Wildcard test names can be passed, if the paths are coherent and the test runner
  +is called from a `bash` shell or similar that does the globbing. For example,
  +to run all the wallet tests:
  +
  +```
  +test/functional/test_runner.py test/functional/wallet*
  +functional/test_runner.py functional/wallet* (called from the test/ directory)
  +test_runner.py wallet* (called from the test/functional/ directory)
  +```
  +
  +but not
  +
  +```
  +test/functional/test_runner.py wallet*
  +```
  +
  +Combinations of wildcards can be passed:
  +
  +```
  +test/functional/test_runner.py ./test/functional/tool* test/functional/mempool*
  +test_runner.py tool* mempool*
  +```
  +
  Run the regression test suite with:
  ```
  