Re: [PATCH 1/4] add: document the chmod option

Thomas Gummerer [off-list ref] writes:

Ugh, thanks for catching.  I'll wait a few days for more comments and
address it in a re-roll.

Thanks for starting this.  I agree with you and Peff that running
"chmod" on the resulting index after other "add" operations took
place is the right approach, as we want to flip the executable bit
for paths that hasn't otherwise changed.