The new RELRO option is described as "enable -z relro in ELF linker by default". This is not useful to the reader. The name of the option implies that it enables that feature. What the user installing a port needs to know is what effect that option will have. For example: "Enable Relocation Read-Only memory corruption mitigation by default."
I think it's important that the option description *also* include the string relro. A user interested in mitigations will immediately know what a relro option does, while the more verbose description takes more thought/consideration. E.g. something like Enable relocation memory corruption mitigation (-z relro) by default.
A commit references this bug: Author: bapt Date: Tue Mar 24 16:36:26 UTC 2020 New revision: 529050 URL: https://svnweb.freebsd.org/changeset/ports/529050 Log: Improve RELRO description PR: 212377 Submitted by: emaste Reported by: wblock Changes: head/devel/binutils/Makefile