[R] glm binomial loglog (NOT cloglog) link

[William Simpson]

I would like to do an R glm() with
family = binomial(link="loglog")

Right now, the cloglog link exists, which is nice when the data have a
heavy tail to the left. I have the opposite case and the loglog link
is what I need. Can someone suggest how to add the loglog link onto
glm()? It would be lovely to have it there by default, and it
certainly makes sense to have the two opposite cases cloglog and
loglog.

Thanks for any help.

Bill