Currently -XX:+PrintFlagsRanges will print "[ ... ]" for those flags without range.

In order to tell which flags are implemented and which are not, we need a mechanism to tell them apart. Flags with constraints are allowed not to specify explicit range, if default range works, so for such flags (which we do have), we need to modify how -XX:+PrintFlagsRanges.

We need -XX:+PrintFlagsRanges to substitute default range values "[ MIN, MAX ]" suitable for the flag's type, when printing those flags that have constraints, but no explicit range.