net-mgmt/netbox: Update to 2.6.9

• Remove two backported patches that are no longer required. [1]
• Backport a patch from upstream that fixes a regression when accessing the API documentation.
• Update the WWW field.

Changelog:

Enhancements:

• Include direct link to rack elevations on site view
• Move virtual machine results near devices in global search
• Added copy button for API tokens

Bug Fixes:

• Prevent the deletion of a virtual chassis when a cross-member LAG is present
• Respect custom field default values when creating objects via the REST API
• Fix exception on password change page for local users [1]
• Fix unable to assign IP to interface [1]

MFH: 2020Q1