LDAP group membership matching should be case insensitive by default

LDAP group membership matching is case-sensitive inside Nexus Repository Manager. In rare cases some LDAP servers systems may enforce group matching case-sensitively, but by default DN and attribute matching is case-insensitive:

https://stackoverflow.com/questions/29897684/is-ldap-dn-case-insensitive

This issue is to acknowledge the application default matching algorithm and provide a vehicle to gather user feedback if change the default is warranted/desired by users.

Changing the default matching could conceivably result in a security escalation in rare circumstances, so such a change could require a major version bump of product.

The IQ Server also appears to match case sensitively on group membership as well, so both server product defaults are consistent to my knowledge.