The information presented by emerge --help is different from that presented by the man page. The man page seems WAY out of date! Reproducible: Always Steps to Reproduce:
Created attachment 12831 [details, diff] patch to the emerge.1 man page file What I could spot. Somebody should check over this carefully, as I am not a man page writer!
i already added all of this and more to the manpage :) grab latest version off of cvs