ln: Use stdbool, style nits.

[des]

Summary

MFC after: 1 week
Sponsored by: Klara, Inc.

[des]

mark usage() dead

[allanjude]

reviewed-by: allanjude

bin/ln/ln.c

132

This comment should maybe be updated to Implied when fflag is true?

[imp]

In D44511#1015246, @des wrote:

mark usage() dead

What benefit is this over relying on the exit in there to imply it? Not saying it's wrong, just trying to understand

[des]

fix comment as per @allanjude

[des]

In D44511#1015260, @imp wrote:

In D44511#1015246, @des wrote:

mark usage() dead

What benefit is this over relying on the exit in there to imply it? Not saying it's wrong, just trying to understand

usage() is at the bottom, so the compiler will see calls to it before it realizes that it's dead, unless we tell it.