Clarify Nokia (classic CLI) options about bgpq3 HOT 2 CLOSED

that is correct, prefix length ranges are supported for prefix-list in classic CLI, as well as in the MD-CLI as follows:

A:admin@VSR# compare
+   prefix 1.0.0.0/24 type range {
+       start-length 12
+       end-length 16
+   }

/cc @snar

from bgpq3.

Corrected:

./bgpq3 -36AN -R 128 -l foo AS8218
configure router policy-options
begin
no prefix-list "foo"
prefix-list "foo"
prefix 2001:67c:25a8::/48 prefix-length-range 48-128
prefix 2001:1b48::/32 prefix-length-range 32-128
prefix 2a00:1f60::/32 prefix-length-range 32-128

from bgpq3.