test/README: clarify last test number group
@@ -29,7 +29,8 @@ The number {nn} is (somewhat loosely) grouped as follows:
60-79 APIs
70 PACKET layer
80-89 "larger" protocols (CA, CMS, OCSP, SSL, TSA)
-90-99 misc
+90-98 misc
+99 most time consuming tests [such as test_fuzz]
A recipe that just runs a test executable
