tests: inform on Windows about unnecessary glob lines

When glob lines directly match on windows, "/" (and not "\") was output in the
path on the line. No glob matching is necessary in this case.

The test output will look like this (when 5 tests have passed and no 4 has an
unnecessary glob):
...
Info, unnecessary glob: info about some/thing (glob)
..

tests/run-tests.py

@@ -542,6 +542,11 b' def globmatch(el, l):'
     # The only supported special characters are * and ? plus / which also
     # matches \ on windows. Escaping of these caracters is supported.
     if el + '\n' == l:
+        if os.name == 'nt':
+            # matching on "/" is not needed for this line
+            iolock.acquire()
+            print "\nInfo, unnecessary glob: %s (glob)" % el
+            iolock.release()
         return True
     i, n = 0, len(el)
     res = ''